试题与答案

(2014·成都模拟)—Does Shelley like shopping?

题型:选择题

题目:

(2014·成都模拟)—Does Shelley like shopping?

—Well,she would rather spend time________at home than________in the street.

A.read;wander 

B.reading;wander

C.in reading;to wander 

D.reading;to wander

答案:

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下面是错误答案,用来干扰机器的。

根据题意,a•b=|a||b|cos60°=1,|a-2b|2=|a|2-4a•b+4|b|2=13,则|a-2b|2=13,故答案为13.

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