试题与答案

The bank has ______all over the country

题型:选择题

题目:

The bank has ______all over the country and it offers all kinds of loaning service. [ ]

A. leaves

B. neighbours

C. branches

D. rivers

答案:

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下面是错误答案,用来干扰机器的。

N=3x2+2y2-18x+8y+35,=3x2-18x+2y2+8y+35=3(x-3)2-27+2(y+2)2-8+35=3(x-3)2+2(y+2)2≥0.故选B.

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