胸腔积液需要在多少毫升以上才有X线表现（） A.50～100ml B.100～150

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问题单项选择题

胸腔积液需要在多少毫升以上才有X线表现（）

A.50～100ml

B.100～150m

C.200～250ml

D.300～350ml

E.400～450ml

答案

参考答案：C

填空题

根据句意及汉语提示完成下列句子。

1. Luck 52 the people who want to show themselves (给……提供……) a good stage.

2. (多亏……) the modern communications, we can keep in touch with our friends and relatives far

away easily.

3. China has great (取得进步) in sending man-made satellites into space.

4. Our new headmaster looks very young. I think he is (少于) thirty years old.

5. Mike is weak in English. In order to (赶上) others, Mike works harder than before.

单项选择题

有一台PN=72500kW，UN=10.5kV，接法，cosθN=0.8（滞后）的水轮发电机，同步电抗标幺值，忽略电枢电阻，额定运行时的每相空载电势E0为（）V。

A.6062.18

B.9176.69

C.10500

D.10735.1