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问题 单项选择题

根据规程JGJ231-2010，对双排脚手架的每步水平杆层，当无挂扣钢脚手架板加强水平层刚度时，应每几跨设置水平斜杆（）

A.3

B.4

C.5

D.6

答案

参考答案：C

选择题

I ______ the book for two weeks. I must return it to the school library.[ ]

A. borrow

B. have borrowed

C. kept

D. have kept

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填空题

根据汉语提示填入单词的适当形式。

1. Robert enjoys _____ (收集) stamps. And now he has 300 of them.

2. She will be the _____ (第五个) to speak at the meeting.

3. I am really sorry I was late. I just _____ (错过) the early bus this morning.

4. Nancy is _____ (在楼下). Go and find her yourself.

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