超前自学网

 找回密码
 立即注册

奥鹏在线作业,2元一门,先做后付,微信424329

查看: 62|回复: 0

20春学期《离散数学》在线平时作业3

[复制链接]

3万

主题

3万

帖子

9万

积分

管理员

Rank: 9Rank: 9Rank: 9

积分
95816
发表于 2020-8-8 19:01:02 | 显示全部楼层 |阅读模式
微信公众号:超前自学网
点击这里
<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>

<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。一棵根树是完全</span><span lang="EN-US"><font face="Times New Roman">m</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">叉树,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'">该图(</span><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&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'">每个结点的度数是</span><span lang="EN-US"><font face="Times New Roman">m</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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&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'">每个结点的出度都是</span><span lang="EN-US"><font face="Times New Roman">m</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;</span></font>
C:<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'">每个结点的出度不是</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'">就是</span><span lang="EN-US"><font face="Times New Roman">m</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;&nbsp; </span></font></span></font></p>
D:<font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">恰有一个结点入度为</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'">:其余结点入度为</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></font>

<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

<span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><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。结点是树的叶结点,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><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'"></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt">&nbsp;</p></span>
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'"><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">度数不为</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; 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-fareast-font-family: 宋体">0</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">;</span></span></font></p>
B:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">度数大于</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; 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-fareast-font-family: 宋体">1</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">;</span>
C:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">度是等于</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; 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-fareast-font-family: 宋体">1</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">。</span>

<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>

<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/12257662070001.bmp"></img>
A:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257662257182.bmp"></img>
B:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257662635783.bmp"></img>
C:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257663253904.bmp"></img>
D:<img alt="" src="http://file.open.com.cn/itemdb/dbdx/lisanshuxue/test/12257663473905.bmp"></img>

<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

<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'">选择填空题。</span><span lang="EN-US"><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'">是</span><span lang="EN-US"><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'">上关系,如果</span><span lang="EN-US"><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'">是自反的,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'">(</span><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&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><font size="3"><span lang="EN-US"><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'">中有些元素</span><span lang="EN-US"><font face="Times New Roman">x</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,有</span><span lang="EN-US"><font face="Times New Roman">&lt;x,x&gt;</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">&isin;</span><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt">R</span><span lang="EN-US"> </span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;</span></font><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"></span></font></p>
B:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 68.25pt; mso-char-indent-count: 6.5"><font size="3"><font face="Times New Roman"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所有</span><span lang="EN-US"><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'">中元素</span><span lang="EN-US"><font face="Times New Roman">x</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,都有</span><span lang="EN-US"><font face="Times New Roman">&lt;x,x&gt;</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">&isin;</span><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt">R</span><span lang="EN-US"> </span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;</span>&nbsp;<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 68.25pt; mso-char-indent-count: 6.5"><font size="3"><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;</span></font></span></font></p>
C:<font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所有</span><span lang="EN-US"><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'">中元素</span><span lang="EN-US"><font face="Times New Roman">x,y</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,如果有</span><span lang="EN-US"><font face="Times New Roman">&lt;x,y&gt;</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">&isin;</span><font face="Times New Roman"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt">R</span><span lang="EN-US"> </span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,也有</span><span lang="EN-US"><font face="Times New Roman">&lt; y, x &gt;</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">&isin;</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><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'">;则</span><span lang="EN-US"><font face="Times New Roman">x=y </font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></font>

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

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/123069185339013.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/123068960454614.bmp" />
A:错误
B:正确

判断下面命题的正误&ldquo;不是所有完全图Kn都是欧拉图,但是所有完全图Kn都是汉密尔顿图。&rdquo;
A:错误
B:正确

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>

<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

<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 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">多选题。</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-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。</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"><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">下面所列代数系统哪些是半群?</span></font></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"><span lang="EN-US">&lt;I,+&gt;,<span style="mso-spacerun: yes">&nbsp;</span></span></span></font></p>
B:<font size="3"><font face="宋体"><span lang="EN-US">&lt;R,+&gt;,<span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></font></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></font>
D:<font size="3"><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"> </font></span></font>
E:<font size="3"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;</span></font><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>

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

QQ|Archiver|手机版|小黑屋|超前自学网 ( 皖ICP备20014425号-1 )|网站地图

GMT+8, 2025-5-24 07:19

Powered by Discuz! X3.4

© 2001-2013 Comsenz Inc.. 技术支持 by 巅峰设计

快速回复 返回顶部 返回列表