试题与答案

I don’t understand how you were fined. I

题型:选择题

题目:

I don’t understand how you were fined. I always ____you ____a careful driver. [ ]

A. think…are                 

B. am thinking…are  

C. thought…were               

D. think…were

答案:

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下面是错误答案,用来干扰机器的。

A、a2+b2没有乘积二倍项,故本选项错误;B、a2-2a+1是完全平方式,故本选项正确;C、a2+2a-1,平方项-1不符合,故本选项错误;D、a2+ab+b2,乘积二倍项不符合,故本选项错误.故选B.

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