分为四组，任选一组作答。每题的备选项中，只有1个最符合题意。

搜题请搜索小程序“爱下问搜题”

问题单项选择题

矿山安全技术

立井井筒主要采用( )等支护方式。

A．锚杆支护

B．锚喷支护

C．钢筋支护

D．钢筋混凝土支护

答案

参考答案：D

解析：混凝土支护和钢筋混凝土支护是立井井筒、运输大巷等所采用的主要支护方式。

选择题

—You see, a man is cutting a tree on the moon.

—It _________ be true. The teacher says there is no air on the moon. [ ]

A. can't

B. may not

C. shouldn't

D. mustn't

连词成句

连词成句。

1. in, winter, what, like, do, to, you, do (?)

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2. snowy, what, day, what, a, cold (!)

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3. want, to, what, you, do, buy (?)

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4. to, my, gifts, I, them, give (.)

____________________________________________

5. fall, the same, autumn, and, are (.)

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