已知Cl2-空气的混合气体在t=20℃,P=101325Pa.工况下,Cl2占2.5

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问题:

已知Cl2-空气的混合气体在t=20℃,P=101325Pa.工况下,Cl2占2.5%(体积分数),在填料塔中用水吸收,要求净化效率为98%,填料塔实际液气比为最小液气比的1.2倍,则出口处Cl2的液相浓度为()kmolCl2/kmolH2O。

A.4.0×10-3

B.3.8×10-5

C.3.8×10-4

D.4.0×10-5

考点:注册公用设备工程师暖通空调专业案例勘察设计注册公用设备工程师暖通空调专业案例
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饭店分时营销的运作方式可以分为双边式、三边式、多边式三大类,划分标准是( )。

A.操作主体

B.时间长短

C.双方的关系

D.销售方式

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阅读短文,回答问题。

     What time can you have breakfast? Breakfast is very important and you must eat it. People eat

breakfast in one or two hours after they get up. It's good to eat breakfast before nine o'clock.. Some

people don't eat anything in the morning. Some are very busy. Others want to be thin. But both (两个

都) reasons are bad. It's difficult to work or study well without breakfast, and it can't help one get thin.

In fact, if one doesn't eat breakfast, it may even make one fat. In the morning, you must eat some good

food. You can eat some eggs, some bread and drink some milk. You can eat some chicken as well. If

you get up late after nine o'clock, you still must eat breakfast. You can eat it in one or two hours after

you get up.

1. When can people have breakfast?

________________________________________________________

2. Why don't some people eat breakfast?

________________________________________________________

3. Can one get thin by not eating breakfast?

________________________________________________________

4. When can one eat breakfast if he gets up late?

________________________________________________________

5. What can one eat for breakfast?

________________________________________________________

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外感腰痛最常见的病邪是()。

A.风邪

B.燥邪

C.寒邪

D.湿邪

E.暑邪

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圆柱的高一定,它的侧面积与底面周长成(    )比例。

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闸阀根据闸板结构形式可分为()和()两大类。

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