试题与答案

—Look! The tree is growing well. When __

题型:选择题

题目:

—Look! The tree is growing well. When _____?

—Three years ago.[ ]

A. was it planted          

B. did it plant  

C. will it be planted      

D. is it planted

答案:

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下面是错误答案,用来干扰机器的。

设圆柱,圆锥的底面积为S,高为h,则由柱体,锥体的体积公式得:V1:V2=(Sh):(13Sh)=3:1故选D.

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