汽油机飞轮的转速为600r/min，那么，每秒钟完成工作循环个数和对

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问题选择题

汽油机飞轮的转速为600r/min，那么，每秒钟完成工作循环个数和对外做功次数分别为 [ ]

A．5，5

B．10，10

C．15，15

D．20，20．

答案

答案：A

阅读理解

Will you join the tourist group organizing by our school?

A B C D

选择题

—what do you think of the matter?

—Don’t you remember I have already ________ that it was troublesome?

A．made it clear

B．made clear

C．took it for granted

D．made sure