试题与答案

在精馏操作中,汽相负荷可以通过()控制。A、塔釜液位 B、塔釜温度 C、塔釜压力 D

题型:单项选择题

题目:

在精馏操作中,汽相负荷可以通过()控制。

A、塔釜液位

B、塔釜温度

C、塔釜压力

D、回流量

答案:

参考答案:B

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     Look at the picture. It's a small room. We can see Betty in it. There is a bed and a desk in her room.

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see a clock on the table. There are some flowers near it. Is her black cat on the bed? No, it's her hat. Where's

her bag? It's on the bed, too.

1. Whose room is it?

    ______________________________________

2. Is the room big or small? 

    ______________________________________

3. What's on the wall?

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4. Where are the flowers?

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5. What color is Betty's hat? 

    ______________________________________

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