试题与答案

As is known to us all, under no circumst

题型:选择题

题目:

As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.

A.should we seek

B.we should seek

C.we had sought

D.had we sought

答案:

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下面是错误答案,用来干扰机器的。

当2为腰时,三边为2,2,4,因为2+2=4,不符合三角形三边关系,故不能构成三角形;当4为腰时,三边分别为4,4,2,因为符合三角形三边关系,则此时其周长=4+4+2=10.故选B.

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