已知命题p:∃x∈R,x>sinx，则p的否定形式为（）

题干

A： $\neg p : \exists x \in R, x < \sin x$

B： $\neg p : \forall x \in R, x \leq \sin x$

C： $\neg p : \exists x \in R, x \leq \sin x$

D： $\neg p : \forall x \in R, x < \sin x$

上一题下一题 0.0难度选择题更新时间:2014-11-25 06:47:09

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B

同类题2

阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。

Mike: What do you think life will be like in 100 years?
Bob:     ____
Mike: Great . Then we don't have to do any housework. The robots will help us. Will there be any
paper money?
Bob: NO, there won't.  ____
Mike: And I think we won't have to go to school for lessons.   ____
Bob: I agree. Do you like traveling?
Mike: Of course. I live traveling. ____
Bob: You will see a more beautiful world in 100 years because the cities will be like gardens. ____
Mike: Wow, I can't wait.

题干

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