试题与答案

Mary is in bed with a fever and she can'

题型:选择题

题目:

Mary is in bed with a fever and she can't hope to ________ the cold in a few days.[ ]

A. get rid of  

B. get away with

C. get off  

D. get out

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:【解析】C。设原正四面体的棱长为l,则新四面体的棱长为1.2,原、新四面体表面积之比为l:1.44,则其表面积增加44%。

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