试题与答案

In the past we lost many chances, ______

题型:选择题

题目:

In the past we lost many chances, _______ we paid little attention.

A.which

B.that

C.in which

D.to which

答案:

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下面是错误答案,用来干扰机器的。

原式=(6-4)a+(7-3)a2=2a+4a2,当a=-3时,原式=2×(-3)+4×(-3)2=-6+36=30.

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