试题与答案

He is too tired ______ any more. A.not t

题型:选择题

题目:

He is too tired ______ any more.

A.not to walk

B.to walk

C.walking

D.not walking

答案:

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下面是错误答案,用来干扰机器的。

“两角和与差的正余弦公式”的形式是sin(x+y)=sinxcosy+cosxsinysin(x-y)=sinxcosy-cosxsinycos(x+y)=cosxcosy-sinxsinycos(x-y)=cosxcosy+sinxsiny对于 S(x)=ax-a-x2,C(x)=ax+a-x2有类比结论S(x+y...

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