【单选题】
下列各图是无向完全图的是( )
①
<imgwidth="27"height="84"src="../uploadfiles/word/lsss001.files/image042.png">
②
<imgwidth="86"height="90"src="../uploadfiles/word/lsss001.files/image043.png">
③
<imgwidth="92"height="84"src="../uploadfiles/word/lsss001.files/image044.png">
④
<imgwidth="96"height="78"src="../uploadfiles/word/lsss001.files/image045.png">
【单选题】
在公式(<imgwidth="26"height="20"src="http://wljy.whut.edu.cn//uploadfiles/word/lsss002.files/image034.png">)F(x,y)→(<imgwidth="12"height="15"src="http://wljy.whut.edu.cn//uploadfiles/word/lsss002.files/image035.png">y)G(x,y)中变元x是( )
【判断题】
设<imgwidth="69"height="21"v:shapes="对象_x0020_24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image022.png">,<imgwidth="88"height="24"v:shapes="对象_x0020_25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image024.png">,则<imgwidth="105"height="25"v:shapes="对象_x0020_26"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image026.png">
【判断题】
对于任何(n,m)—图<imgwidth="176"height="36"v:shapes="对象_x0020_36"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image035.png">。
【单选题】
在公式<imgwidth="228"height="20"src="http://wljy.whut.edu.cn//uploadfiles/word/lsss001.files/image005.png">中变元y是()
【单选题】
设个体域是整数集,则下列命题的真值为真的是( )
①
<imgwidth="9"height="13"src="../uploadfiles/word/lsss001.files/image050.png">y<imgwidth="9"height="11"src="../uploadfiles/word/lsss001.files/image051.png">x(x·y=1)
②
<imgwidth="9"height="11"src="../uploadfiles/word/lsss001.files/image051.png">x<imgwidth="9"height="13"src="../uploadfiles/word/lsss001.files/image050.png">y(x·y≠0)
③
<imgwidth="97"height="19"src="../uploadfiles/word/lsss001.files/image054.png">
④
<imgwidth="91"height="22"src="../uploadfiles/word/lsss001.files/image055.png">
【单选题】
设M(x):x是人;F(x):x要吃饭。用谓词公式表达下述命题:所有的人都要吃饭,其中错误的表达式是( )
①
<imgwidth="118"height="20"src="../uploadfiles/word/lsss001.files/image015.png">
②
<imgwidth="128"height="20"src="../uploadfiles/word/lsss001.files/image016.png">
③
<imgwidth="111"height="20"src="../uploadfiles/word/lsss001.files/image017.png">
④
<imgwidth="122"height="20"src="../uploadfiles/word/lsss001.files/image018.png">
【单选题】
设A={{1,2,3},{4,5},{6,7,8}},下列选项正确的是( )
②
{1,2,3}<imgwidth="15"height="15"src="../uploadfiles/word/lsss002.files/image038.png">A
③
{{4,5}}<imgwidth="15"height="12"src="../uploadfiles/word/lsss002.files/image039.png">A
④
<imgwidth="16"height="17"src="../uploadfiles/word/lsss002.files/image040.png">∈A
【单选题】
设A是正整数集,R={(x,y)|x,y∈A∧x+3y=12},则R∩({2,3,4,6}×{2,3,4,6})=()
①
<imgwidth="16"height="16"src="../uploadfiles/word/lsss001.files/image010.png">
【单选题】
下列命题正确的是()
①
{l,2}<imgwidth="15"height="15"src="../uploadfiles/word/lsss001.files/image011.png">{{1,2},{l,2,3},1}
②
{1,2}<imgwidth="15"height="15"src="../uploadfiles/word/lsss001.files/image011.png">{1,{l,2},{l,2,3},2}
③
{1,2}<imgwidth="15"height="15"src="../uploadfiles/word/lsss001.files/image011.png">{{1},{2},{1,2}}
④
{1,2}∈{1,2,{2},{l,2,3}}