对直线AB往返丈量结果分别为300.682m和300.658m，则相对误差为( )

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问题单项选择题

对直线AB往返丈量结果分别为300.682m和300.658m，则相对误差为( )。

A．1/10000

B．1/11000

C．1/12000

D．1/13000

答案

参考答案：C

填空题

用所给动词的正确形式填空。

1. If you want to learn English well, you should practise _________ (speak) English.

2. I spend two hours _________(do) my homework.

3. Hobo needs Eddie _________(carry) all the shopping bags.

4. I don't like _________(eat) hamburgers because they can make me fat.

5. My mother has a bad cold. She is __________(lie) in bed.

多项选择题

瘿病的治则为

A．理气化痰

B．活血软坚

C．滋阴降火

D．活血化郁

E．宁心柔肝