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20春学期《离散数学X》在线平时作业3

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发表于 2020-8-8 19:01:01 | 显示全部楼层 |阅读模式
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<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253392820811.bmp"></img>
A:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253393099402.bmp"></img>
B:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253393240813.bmp"></img>
C:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253393403154.bmp"></img>
D:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253393542845.bmp"></img>

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257656827651.bmp"></img>
A:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257657027962.bmp"></img>
B:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257657182653.bmp"></img>
C:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257657315624.bmp"></img>
D:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257657514535.bmp"></img>

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12252476675311.bmp"></img>
A:矛盾式
B:重言式
C:无法确定
D:不知道

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">下面是</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; mso-char-indent-count: 1.5"><font size="3"><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&quot;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">xC(x),<span style="mso-spacerun: yes">&nbsp; </span></font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">$</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">x(A(x)</font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Uacute;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">B(x)), <span style="mso-spacerun: yes">&nbsp;&nbsp;</span></font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&quot;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">x(B(x)</font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&reg;</span></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">C(x)) <span style="mso-spacerun: yes">&nbsp;</span></font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&THORN;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">$</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">xA(x)<o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的谓词推理过程。在这个过程中每一步中的(</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">)处是此步所用的推理规则。请写出这些推理规则。</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; TEXT-ALIGN: left; mso-char-indent-count: 3.0" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑴</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">$</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">x(A(x)</font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Uacute;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">B(x)),</font></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>)<o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑵</span><font face="Times New Roman"><span style="mso-bidi-font-weight: bold"> </span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">A(a)</span></font><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Uacute;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">B(a) </font></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span>(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>) <span style="mso-spacerun: yes">&nbsp;</span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑴</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑶</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&quot;</span></span><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">xC(x)</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;</span>(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span></span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-weight: bold"><span style="mso-spacerun: yes"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑷</span>&nbsp;</span></span></font></font><font size="3"><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">C(a)</span></font><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;</span>(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes">&nbsp;</span>) <span style="mso-spacerun: yes">&nbsp;</span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑶</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp; </span><o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑸</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&quot;</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">x(B(x)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&rarr;</span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">C(x))<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>(<span style="mso-spacerun: yes">&nbsp;&nbsp; </span><span style="mso-spacerun: yes">&nbsp;</span>) <o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑹</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"> B(a)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&rarr;</span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">C(a)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span>(<span style="mso-spacerun: yes">&nbsp; </span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span>) <span style="mso-spacerun: yes">&nbsp;</span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑸</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑺</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">B(a)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; </span>(<span style="mso-spacerun: yes">&nbsp; </span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span>)<span style="mso-spacerun: yes">&nbsp; </span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑷</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑹</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"> I12<o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑻</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"> A(a)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>( <span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span>)<span style="mso-spacerun: yes">&nbsp; </span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑵</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑺</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"> I10<o:p></o:p></font></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 30.85pt; TEXT-ALIGN: left; mso-char-indent-count: 2.94" align="left"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑼</span><span style="mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol; mso-bidi-font-weight: bold"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">$</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">xA(x))<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span>(<span style="mso-spacerun: yes">&nbsp; </span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span>) <span style="mso-spacerun: yes">&nbsp;&nbsp;</span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">⑻</span></font><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; mso-char-indent-count: 1.5; mso-outline-level: 1"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">⑴</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑵</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;</span><font face="Times New Roman"> </font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">⑶</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑷</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑸</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑹</span><font face="Times New Roman"> <span lang="EN-US">US</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑺</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑻</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑼</span><font face="Times New Roman"> <span lang="EN-US">ES</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="COLOR: red; mso-bidi-font-weight: bold"><o:p></o:p></span></font></p>
B:<font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font face="Times New Roman">&nbsp;&nbsp; </font>⑴</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑵</span><font face="Times New Roman"> <span lang="EN-US">EG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑶</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑷</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑸</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑹</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑺</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑻</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑼</span><font face="Times New Roman"> <span lang="EN-US">EG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="COLOR: red; mso-bidi-font-weight: bold"><o:p></o:p></span></font>
C:<font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><font face="Times New Roman">&nbsp;&nbsp; </font>⑴</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑵</span><font face="Times New Roman"> <span lang="EN-US">ES</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑶</span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp; </span>P</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑷</span><font face="Times New Roman"> <span lang="EN-US">US</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑸</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑹</span><font face="Times New Roman"> <span lang="EN-US">US</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑺</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑻</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑼</span><font face="Times New Roman"> <span lang="EN-US">EG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US" style="COLOR: red; mso-bidi-font-weight: bold"><o:p></o:p></span></font>
D:<font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">&nbsp; ⑴</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑵</span><font face="Times New Roman"> <span lang="EN-US">US</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑶</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑷</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑸</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑹</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑺</span><font face="Times New Roman"> <span lang="EN-US">P</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑻</span><font face="Times New Roman"> <span lang="EN-US">T</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;⑼</span><font face="Times New Roman"> <span lang="EN-US">UG</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></font>

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12252465743431.bmp"></img>
A:重言式
B:矛盾式
C:无法确定
D:不知道

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">X,Y </font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是有限集合,</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">|X|=m</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">|Y|=n</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。可以构成</span><span style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman"> <span lang="EN-US">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span>)</span></font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个从</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">X</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">到</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">Y</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的函数。</span></font></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">m<sup>n</sup>&nbsp;</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></font></span></font></p>
B:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US"><font face="Times New Roman">mn&nbsp;</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></font>
C:<font size="3"><span lang="EN-US"><font face="Times New Roman">2<sup>mn&nbsp;</sup></font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></font></span></font>
D:<font size="3"><span lang="EN-US"><font face="Times New Roman">n<sup>m </sup></font></span></font>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-outline-level: 1"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">令命题</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">P</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">表示&ldquo;没有大学生不懂外语。&rdquo;&nbsp; <font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">下面<span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">命题</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</span>)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">与</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">P</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">等价。</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></font></span></font></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt; mso-outline-level: 1"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">有些大学生懂一些外语。</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></font></p>
B:<font size="3"><font face="宋体">&nbsp;&nbsp;&nbsp; 所有大学生都懂一些外语。<span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></font></font>
C:<font face="宋体" size="3">&nbsp;&nbsp;&nbsp; 有些大学生懂所有外语。</font>
D:<font face="宋体" size="3">&nbsp;&nbsp;&nbsp; 没有大学生懂所有外语。</font>

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253274357031.bmp"></img>
A:等价
B:不等价
C:无法确定
D:不知道

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12253261108121.bmp"></img>
A:B:①:⑵⑶⑺⑻
B:B:②:⑶⑷⑻
C:B:③:⑶⑹⑺⑻
D:B:④:⑶⑺

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12263081901091.bmp"></img>
A:f是满射,g是入射。
B:f是双射,g是双射
C:f是入射,g是满射。
D:f是入射,g是入射。

<p>试题见图片<img height="384" width="512" alt="" src="http://file.open.com.cn/ItemDB/43594/fd1f5147-a9e5-4105-8480-90f647d697fa/2009101020251752.JPG" /></p>
A:a图
B:b图
C:c图
D:d图
E:e图
F:f图
G:g图
H:h图
I:i图
J:j图

下面的命题公式中哪些是永真式,只写出题号即可<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123062290326512.bmp"></img>
A:1
B:2
C:3
D:4

<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">多选填空题。</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">给定集合</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><font face="Times New Roman">A={1,2,3}</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,定义</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><font face="Times New Roman">A</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">上的等价关系如下:</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span></font></p><p style="TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-outline-level: 1" class="MsoNormal"><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><font size="3"><font face="Times New Roman">S={&lt;1,1&gt;,&lt;1,2&gt;,&lt;2,1&gt;,&lt;2,2&gt;,&lt;3,3&gt;}<o:p></o:p></font></font></span></p><p style="TEXT-INDENT: 15.75pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 1.5" class="MsoNormal"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等价关系</span><span lang="EN-US"><font face="Times New Roman">S</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中含有等价类</span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp; </span>(<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></font></p>
A:<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span lang="EN-US"><font face="Times New Roman">{1}</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></font></span></font></p>
B:<font size="3"><span lang="EN-US"><font face="Times New Roman">{2}</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></font></span></font>
C:<font size="3"><span lang="EN-US"><font face="Times New Roman">{3}</font></span></font>
D:<font size="3"><span lang="EN-US"><font face="Times New Roman">{1,2}</font></span></font>
E:<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span lang="EN-US"><font face="Times New Roman">{1,3}</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></font></p>
F:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US"><font face="Times New Roman">{2,3}</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span></font></span></font>
G:<font size="3"><font face="Times New Roman">&nbsp;{</font><span lang="EN-US"><font face="Times New Roman">1,2,3}</font></span></font>

<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123062356992111.bmp"></img>
A:A:⑴⑵⑶
B:B:⑴⑵⑷
C:C:⑵⑶⑷
D:D:⑴⑵⑶⑷

<p>试题见图片<img height="384" width="512" alt="" src="http://file.open.com.cn/ItemDB/43594/aa0897be-b269-47c2-8596-f7af09723b49/20091010204014761.JPG" /></p>
A:A图
B:B图
C:C图

设A={&Phi;},B=P(P(A))。判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123069049348413.bmp" />
A:错误
B:正确

R是A上关系,判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123069173734311.bmp" />
A:错误
B:正确

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 29.25pt; TEXT-INDENT: -29.25pt; mso-list: l0 level2 lfo1; tab-stops: list 29.25pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">判断题</span><span style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman"> </font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">。判断下面的说法是否正确。</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 26.25pt; mso-char-indent-count: 2.5"><font size="3"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">R</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">和</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">S</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">都是</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">A</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold">上任何传递关系,则</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">R</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&cap;</span><span lang="EN-US" style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">S </font></span><span style="COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt; mso-ansi-language: ZH-CN; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold">也传递。</span></font><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></p>
A:错误
B:正确

设A={a,{a},{a,b},{{a,b},c}},判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068844868714.bmp" />
A:错误
B:正确

设A={a,{a},{a,b},{{a,b},c}},判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068830159312.bmp" />
A:错误
B:正确

设A={&Phi;},B=P(P(A))。判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123069060918714.bmp" />
A:错误
B:正确

判断下面命题的真值<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068787532812.bmp" />
A:错误
B:正确

R和S都是A上关系,判断下面命题的真值<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123069155251514.bmp" />
A:错误
B:正确

R和S都是A上关系,判断下面命题的真值<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123069147623413.bmp" />
A:错误
B:正确

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">判断题,判断下面说法是否正确。</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><font size="3"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&ldquo;对于整数集合</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">I</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">上的减法运算&ldquo;-&rdquo;来说,</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman"> 0</font></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">是幺元。&rdquo;</span></font><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></span></p>
A:错误
B:正确

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