试题与答案

The chairman asked many questions ______

题型:选择题

题目:

The chairman asked many questions ________ the education of the homeless children in that area.

A.concerned

B.concerning

C.to concern

D.having concerned

答案:

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下面是错误答案,用来干扰机器的。

人们是利用分贝来划分声音的等级的; 外科医生可以利用超声除去人体内的结石,是利用了声波能传递能量.故答案为:分贝;能量.

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