【判断题】【消耗次数：1】
用真值表判断公式“(p?q) ? (?q??p)”的类型为重言式。
①
正确
②
错误
参考答案：
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【多选题】
用等值演算法推导公式“(pù?q) ú (qù?p)”和下面哪个公式等价:
①
(púq) ù? (pùq)
②
? (p?q)
③
? ((p?q) ù (q?p))
④
(púq) ù (?pù?q)
随机题目
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I doubt whether the Chinese Football Team can win the game this time.____________
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That’s true.
②
It’s hard to say.
③
I like the team.
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I don’t believe it.
【判断题】
判断线上的内容是否正确：She is under the impression that he isn’t a __genuine____ person for he wouldn’t tell her where and when he went to university.
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正确
②
错误
【判断题】
判断线上的内容是否正确：When the post fell ___vacant___.Dennis Bass was appointed to fill it.
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正确
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错误
【单选题】
Although they had suffered heavy losses, they refused to ____ defeat.
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concede
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conserve
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assert
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conceal
【单选题】
He departed ____ to catch the train only to find his ticket was left in home.
①
in hurry
②
in haste
③
in a haste
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with haste
【单选题】
After so many years, he still ____ the hope that his lost son would return one day.
①
clang to
②
clung to
③
inclined to
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subjected to
【单选题】
Hi, Peter, how is everything with you?____________
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Don’t mention it.
②
Pretty fast.
③
Thanks.
④
Hm, not too bad.
【单选题】
_______ is your girlfriend like?She is very kind and good-looking.
①
How
②
What
③
Which
④
Who