筛板塔缺点是操作弹性小,气速小的情况容易发生冲塔。

题型:判断题

问题:

筛板塔缺点是操作弹性小,气速小的情况容易发生冲塔。

考点:气体分馏装置操作工中级气体分馏装置操作工中级气体分馏装置操作工题库
题型:判断题

下面五位同学在人际交往中遇到了一些问题,请从A-E中选择适合他们的一条建议。

( )1. I hate a classmate of mine because she always speaks ill of (说某人的坏话) me.

( )2. I argued with my friend Eve again because she never understands me.

( )3. I can't make friends with Jim because he is different from me. I can't stand that.

( )4. I have few friends because I won't know how to make friends. It seems that I have

            no interest in anything except my books.

( )5. My friends all complain that I don't keep my promise (信守诺言). I'm very sad.

A. If you promise others, you must keep it. If you can't, don't make any promise.

B. Don't care too much about what others say about you. Just be yourself if you're right.

C. Try to show an interest in others. If you do so, you will find it's easier to make friends.

D. Try to understand others first. Then you can be understood well.

E. It's not necessary to be the same. Respect (尊重) others. Don't hope that all friends are

     the same as you.

题型:判断题

The street are all wet.It ___ during the night.

A.must be raining

B.must havge been rain

C.had to rain

D.must have rained

题型:判断题

设备从投入使用直到山于技术落后而被淘汰所经历的整个时间称为()。

A.自然寿命 

B.经济寿命 

C.技术寿命 

D.周期寿命

题型:判断题

挂平瓦时,第一行檐口瓦伸出檐口()并拉通线找直。

A.20mm

B.40mm

C.60mn

D.120mm

题型:判断题

请写出DCS1800和GSM900环境下,CTU输出功率是多少瓦?通过DCF一级合路后,输出是多少瓦?

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