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20春学期《离散数学X》在线平时作业1

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发表于 2020-8-8 19:01:00 | 显示全部楼层 |阅读模式
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<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 0.05pt"><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">单选填空题:设</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">G</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">是有向简单图,其结点度数序列为</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">(2,2,3,3)</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'; mso-bidi-font-weight: bold">,入度序列为</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">(0,0,2,3)</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'; mso-bidi-font-weight: bold">。则结点的出度序列为</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;&nbsp;&nbsp;&nbsp;&nbsp; </span>)</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">。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 0.05pt"><font size="3"><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;</span></font></span></font></p>
A:<font size="3"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">&nbsp;(2,2,3,3)&nbsp;<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></font>
B:<font size="3"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">&nbsp;(1,1,0,0)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></font></span></font>
C:<font size="3"><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; </span>(2,2,1,0)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></font></span></font>
D:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">(2,2,0,0)<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&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 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'">选择填空题。</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">如果</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">、</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">B</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">都是有限集,且</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">|A|=m, |B|=n</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">,则</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 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">&acute;</span></span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font face="Times New Roman">B |=( <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-size: 10.5pt; mso-bidi-font-weight: bold">。</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><o:p></o:p></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+n </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>
B:<font size="3"><span lang="EN-US"><font face="Times New Roman">&nbsp;</font></span><span lang="EN-US"><font face="Times New Roman">mn </font></span><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></font>
C:<font size="3"><span lang="EN-US"><font face="Times New Roman">m<sup>n </sup></font></span><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"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;</span></font></span></font>
D:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US"><font face="Times New Roman">n<sup>m </sup></font></span><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/12253274357031.bmp"></img>
A:等价
B:不等价
C:无法确定
D:不知道

<img src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257793747341.bmp"></img>
A:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257794101562.bmp"></img>
B:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257794423593.bmp"></img>
C:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257794637964.bmp"></img>
D:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257794850315.bmp"></img>

<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。

<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>

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">命题公式</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">(P</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&reg;</span></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Q)</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&reg;</span></span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Q</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">的主合取范式是(</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-family: 'Times New Roman'">)。</span>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left" align="left"><font size="3"><span lang="EN-US"><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-weight: bold">&or;</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"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US"><font face="Times New Roman">Q</font></span><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"><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" style="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-weight: bold">&or;</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">Q</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">;</span></font>
C:<font size="3"><span lang="EN-US"><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"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US"><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-weight: bold">&or;</span><span lang="EN-US"><font face="Times New Roman">Q)</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">&and;</span><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-weight: bold">(</span><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'; mso-bidi-font-weight: bold">&or;</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"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">&Oslash;</span></span><span lang="EN-US"><font face="Times New Roman">Q<span style="mso-bidi-font-weight: bold"> )</span></font></span><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"><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">(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-weight: bold">&or;</span><span lang="EN-US"><font face="Times New Roman">Q )</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">&and;</span><span lang="EN-US" 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"><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"> 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-weight: bold">&or;</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">Q ) </font></span><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/12257665293281.bmp"></img>
A:自然数集合
B:整数集合
C:有理数集合
D:实数集合

<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'">设</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">.X</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'">、</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">Y </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'">是有限集合,</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">|X|=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'">,</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">|Y|=2</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'">,可以构成</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">(<span style="mso-spacerun: yes">&nbsp;&nbsp; &nbsp;</span>)</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'">个是从</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">X</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'">到</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><font face="Times New Roman">Y</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'">的入射函数。</span></font></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">&nbsp;0&nbsp;</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span></font></span></font></p>
B:<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;&nbsp;&nbsp;</span></font></span></font>
C:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US"><font face="Times New Roman">2<sup>&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">3<sup> </sup></font></span></font>

<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'">单选题。结点是树的内结点,当且仅当</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'">该结点(</span><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font></span></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 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'">度数是大于</span><span lang="EN-US"><font face="Times New Roman">2</font></span><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"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;</span></font></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'">度数大于</span><span lang="EN-US"><font face="Times New Roman">1</font></span><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"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp; </span></font></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'">度数不为</span><span lang="EN-US"><font face="Times New Roman">0</font></span><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/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/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

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="mso-bidi-font-size: 10.5pt; 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-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">多选题。</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-weight: bold">令</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">I</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">是整数集合;</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">N</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">是自然数集合,</span><span lang="EN-US" style="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">是实数集合。+是加法运算,&times;是乘法运算。下面所列代数系统哪些是独异点?</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><o:p></o:p></font></span></font></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&lt;I,+&gt;,<span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></font></p>
B:<font size="3"><font face="宋体">&nbsp;</font><span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"><span lang="EN-US">&lt;R,+&gt;,<span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></span></font>
C:<font size="3"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&lt;I,</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">&times;</span><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&gt;,<span style="mso-spacerun: yes">&nbsp;</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></font></span></font>
D:<font size="3"><font face="Times New Roman">&nbsp;</font><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&lt;N,</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&times;<span lang="EN-US">&gt;,</span></span><span lang="EN-US" style="mso-bidi-font-weight: bold"><font face="Times New Roman">&nbsp;<span style="mso-spacerun: yes">&nbsp;</span></font></span></font>
E:<font size="3"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&lt;R,</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">&times;<span lang="EN-US">&gt;。</span></span></font>

<p style="MARGIN: 0cm 0cm 0pt" class="MsoNormal"><font size="3"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span><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" class="MsoNormal"><font size="3"><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><font face="Times New Roman">T=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'">&times;</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'">完全关系(全域关系)</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><font face="Times New Roman">)<o:p></o:p></font></span></font></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">T</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;&nbsp;&nbsp;&nbsp; </span></font></span></font></p>
B:<font size="3"><span lang="EN-US"><font face="Times New Roman">{2}</font></span></font>
C:<font size="3"><span lang="EN-US"><font face="Times New Roman">{3}</font></span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span></font></span></font>
D:<font size="3"><font face="Times New Roman">&nbsp; </font><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>

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

判断下面命题的真值<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068762328112.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/123068844868714.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/123069049348413.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/123069023946811.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/123069042104612.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/123069066164015.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

判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068934371811.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

判断下面命题的真值。<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/123068951743713.bmp" />
A:错误
B:正确

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