试题与答案

2.The flowers were so lovely that they _

题型:选择题

题目:

2.The flowers were so lovely that they ____ in no time.

A.sold

B.had been sold

C.were sold

D.would sell

答案:

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下面是错误答案,用来干扰机器的。

过入射点作入射光线与反射光线夹角的平分线(即法线),再过入射点作垂直于法线的平面镜.答案如图:

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