【单选题】【消耗次数：1】
He was a good swimmer so he________swim to the river bank when the boat sank.
①
could
②
might
③
should
④
was able to
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相关题目
【单选题】
He was a good swimmer so he ___ swim to the river bank when the boat sank.
①
could
②
might
③
should
④
was able to
【单选题】
He irritates me so much that I could ( ).
①
screaming
②
screamingly
③
screamer
④
scream
【单选题】
He _______ to study harder in the future so that he could have more opportunities to find a better job.
①
resolved
②
resorted
③
requested
④
reserved
【单选题】
When you go to the doctor he asks you to describe your ____ so that he can make a diagnosis (诊断).
①
indications
②
signs
③
symbols
④
symptoms
【单选题】
No man is so foolish but he may give another good counsel sometimes.
①
A．没有人如此愚笨，他有时也能给别人提出好的忠告。
②
B．没有人愚笨到偶尔也给别人提出好的忠告。
③
C．人再愚笨，有时也能给别人提出好的忠告。
④
D．偶尔愚笨的人也能给别人提出好的忠告。
【单选题】
When he was 65,he[填空] that he didn’t want to stop
①
decided
②
decides
③
will decide
④
is deciding
【单选题】
He is so shy that he ____ speaks in the public.
①
often
②
frequently
③
seldom
④
sometimes
随机题目
【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（ ）
①
1∈A
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">
②
{3，3}
③
{3，36，2}
④
{3，36，29，1}
【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}}
【判断题】
具有<imgwidth="17"height="15"v:shapes="对象_x0020_33"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image031.png">条边的连通图最多具有<imgwidth="36"height="19"v:shapes="对象_x0020_34"src="http://wljy.whut.edu.cn:80/uploadfiles/word/lssxpdt.files/image033.png">个结点。
①
正确
②
错误
【单选题】
下列命题联结词集合中，是最小联结词组的是（ ）
①
{┐，<imgwidth="20"height="11"style="-aw-left-pos:0pt;-aw-rel-hpos:character;-aw-rel-vpos:line;-aw-top-pos:0pt;-aw-wrap-type:inline"src="../uploadfiles/word/lsss001.files/image077.png">}
②
{┐，∨，∧}
③
{┐，∧}
④
{∧，→}
【单选题】
下列函数中为双射的是（ ）
①
f：Z→Z,f(j)=j(mod)
②
f：N→N,f(j)=<imgwidth="71"height="46"src="../uploadfiles/word/lsss002.files/image007.png">
③
f：Z→N,f(j)=|2j|+1
④
f：R→R,f(r)=2r-15
【单选题】
设A（x）:x是人，B（x）：x犯错误，命题“没有不犯错误的人”符号化为（ ）
①
<imgwidth="98"height="20"src="../uploadfiles/word/lsss002.files/image014.png">
②
┐<imgwidth="68"height="20"src="../uploadfiles/word/lsss002.files/image015.png">┐B（x））
③
┐<imgwidth="96"height="20"src="../uploadfiles/word/lsss002.files/image016.png">
④
┐<imgwidth="63"height="20"src="../uploadfiles/word/lsss002.files/image017.png">┐B(x))
【单选题】
设<imgwidth="50"height="17"src="http://wljy.whut.edu.cn//uploadfiles/word/lsss002.files/image018.png">，则有（ ）
①
<imgwidth="35"height="16"src="../uploadfiles/word/lsss002.files/image019.png">
②
<imgwidth="37"height="18"src="../uploadfiles/word/lsss002.files/image020.png">
③
<imgwidth="37"height="19"src="../uploadfiles/word/lsss002.files/image021.png">
④
<imgwidth="38"height="20"src="../uploadfiles/word/lsss002.files/image022.png">