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问题 单项选择题

在中硬岩层中光爆时周边眼的装药量一般不宜超过（）。

A.150～200克／米

B.210～230克／米

C.230～250克／米

D.250～270克／米

答案

参考答案：A

填空题

电子式电能表是通过指示灯的闪烁次数imp来代替转盘转动圈数r的，如图所示，如表盘上标的是“3200imp/(kW·h)”字样，那么其含义应该是_____________________．将某用电器单独接在该电子式电能表上工作20min，电能表指示灯   闪烁了320次，则该用电器在上述时间内消耗的电能为__________kW·h，它的电功率是_________W．
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填空题

用所给词的适当形式填空。

1. Australia has beautiful _______(beach).

2. Niagara Falls ________(be) a famous waterfall in Canada.

3. September 10 is ________(teacher)Day.

4. I am glad ____(meet) you here.

5. There are many ____(sheep) on the hill.

6. 1. Listen! She _____(sing) ABC song.

7. I want _____(buy)a new dress.

8. "What's the weather like today?" "It's _____(sun) but cold."

9. His birthday is July the _____(twelve).

10. Jim ________ (have) breakfast at 7:00 in the morning.

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