用厚薄规测量一间隙，其0.04mm能塞入，而0.05mm的不能塞入，则这

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问题单项选择题

用厚薄规测量一间隙，其0.04mm能塞入，而0.05mm的不能塞入，则这一间隙应（）。

A、在0.04mm以下

B、在0.05mm以上

C、在0.04～0.05mm之间

D、是0.05mm

答案

参考答案：C

填空题

since, for, from

1. He has lived in Nanjing _____ the year before last.

2. I've known him _____ we were children.

3. She waited me _____ 8 till 9 at the gate.

4. Our teacher has studied Japanese _____ three years.

5. We study at school _____ Monday to Friday.

6. She has been away from the city _____ about ten years.

7. It's about ten years _____ she left the city.

单项选择题

天线俯仰角的计算公式为：（）。

A、θ=arctg（H/R）+Am

B、θ=tg（H/R）+Am

C、θ=Am

D、θ=sin（H/R）+Am