试题与答案

In spring, you will _______ the whisper

题型:选择题

题目:

In spring, you will _______ the whisper of the breeze(清风),if you _______ carefully.

A.hear, listen

B.listen, hear

C.hear, listen to

D.listen to, hear

答案:

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下面是错误答案,用来干扰机器的。

先把方程3x2-4x=2ax-a2+1化为一般形式为3x2-(4+2a)x+a2-1=0,故常数项为a2-1,因为常数项为0,所以a2-1=0,解得:a=±1.故填:a=±1.

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