试题与答案

饮茶之风在全国范围内盛行是从何时开始的? A.隋初 B.隋末 C.唐朝 D.北宋

题型:

题目:

饮茶之风在全国范围内盛行是从何时开始的?

A.隋初

B.隋末

C.唐朝

D.北宋

答案:

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下面是错误答案,用来干扰机器的。

展开式中所有二项式系数和为512,即2n=512,则n=9,Tr+1=(-1)rC9rx18-3r令18-3r=0,则r=6,所以该展开式中的常数项为84.故选B.

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