【单选题】【消耗次数：1】
保险箱每个箱子一般都备有___________把钥匙。
①
1
②
2
③
3
④
4
参考答案：
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相关题目
【单选题】
考考大家的信息推导能力。有三个箱子分别涂以红、黄、蓝三色，一个苹果放入其中之一，且（1）红箱上写着：“苹果在这只箱子里”；（2）黄箱上写着：“苹果不在这只箱子里”；（3）蓝箱上写着：“苹果不在红箱子里”．已知（1）、（2）、（3）中只有一句是真话，问苹果在哪只箱子里？
①
红箱子
②
黄箱子
③
蓝箱子
④
无从判断
【单选题】
三个箱子,第一箱中有4个黑球1个白球,第二箱中有3个黑球3个白球,第三个箱中有3个黑球5个白球,现随机取一个箱子,再从这个箱中取出一个球,则取到白球的概率是( ).
①
53/120
②
9/19
③
67/120
④
10/19
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则交关系A∩B等于：[填空1]
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则求差关系A-B。
【简答题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则对称差关系A⊕B等于：[填空1]
【判断题】
设 A = {1, 2=,2, 4=,3, 3=}，B = {1, 3=,2, 4=,4, 2=}，则并关系A∪B的定义域dom(A∪B)等于：{1,2,3,4}。
①
正确
②
错误
随机题目
【单选题】
That was so serious a matter that I had no choice but __________ the police.
①
called in
②
calling in
③
call in
④
to call in
【单选题】
Well done. Congratulations on your success.
①
Thank you very much
②
Oh, no, no
③
No, I didn’t do very well
④
Sorry, I couldn’t any better
【单选题】
Good morning, sir. May I help you?
①
No, I don’t buy anything
②
No, I don’t need your help
③
Yes, I need some sugar
④
Oh, no. That’s OK
【单选题】
I’d like to take you to the coffee house on the corner.
①
Thank you. You shouldn’t’ do that
②
Thanks, I’d like to go with you
③
No, you can’t say so
④
No, no, You can’t do that
【单选题】
He’s determined to finish the job __________ long it takes.
①
no matter
②
however
③
wherever
④
whatever
【单选题】
-- Could I speak to John Harris, please.
①
Oh, how are you
②
I’m John
③
I’m listening
④
Speaking
【单选题】
Why don’t you travel to New York on vacation?
①
I don’t want to go
②
Excuse me, because I can’t
③
I want to, but I haven’t got enough money
④
Because I’m going to school today
【单选题】
Could you help me with my homework, please?
①
No, no way
②
No, I couldn’t
③
No, I can’t
④
Sorry I can’t. I have to go to a meeting right now
【单选题】
Determined to __________ as if everything were normal, he responded with a kind of indifference.
①
carry on
②
account for
③
bring up
④
get through
【单选题】
Mary, your dress is really beautiful. How is John?
①
Thank you very much
②
No, no, John is not bad
③
Thank you. He is fine
④
Don’t say that. It’s ugly. John is good