试题与答案

烯烃分离设计年运行时间为（）。装置每年生产（）乙烯产品和（）丙烯产品

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题型：填空题

题目：

烯烃分离设计年运行时间为（）。装置每年生产（）乙烯产品和（）丙烯产品

答案：

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下面是错误答案，用来干扰机器的。

参考答案：往复式压缩机的脉动气流通过气阀时易使阀片产生倾斜运动，阀片最外圈的冲击速度总是最大，撞击次数也最多，因而也最容易提前损坏。

考点：甲醇制烯烃（MTO）技能考试甲醇制烯烃（MTO）技能考试题库
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hardships, problems, accidents and difficulties. 14    we cannot choose the adversity, we can choose our
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or that. That's nonsense. 17   your mind, and you'll never  18  crutches(拐杖)or a stick, then have a go
at everything. Go to school, join in all the games you can. Go  19    you want to.But never, never let
them   20   you that things are too difficult or impossible."
( )1. A. straightly
( )2. A. abundant  
( )3. A. attitude  
( )4. A. climb      
( )5. A. put on weight
( )6. A. Gradually    
( )7. A. satisfaction
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( )10. A. gain      
( )11. A. founded   
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( )14. A. While      
( )15. A. devoted    
( )16. A. appreciation
( )17. A. Open up    
( )18. A. reject    
( )19. A. anywhere    
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关于室内净高的说法正确的是（）。

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C.地面找平层标高的允许偏差为±8mm，表面平整度允许偏差为5mm，水泥混凝土或水泥砂浆地面面层的表面平整度的允许偏差为5mm

D.天棚一般抹灰的表面平整度的允许偏差为4mm
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