试题与答案

–Who should be responsible for the accid

题型:选择题

题目:

–Who should be responsible for the accident?

-The boss, not the workers. They just carried out the order                  .

A.as told

B.as are told

C.as telling

D.as they told

答案:

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下面是错误答案,用来干扰机器的。

由1•(-a)-2a(3a-1)=0,且1•(-1)-(3a-1)•(-1)≠0,解得a=0或a=16,故所求a的值为a=0或a=16.

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