苯酐装置的蒸汽凝液站疏水器旁路需微开。

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问题:

苯酐装置的蒸汽凝液站疏水器旁路需微开。

考点:苯酐装置操作工苯酐装置操作工(初级)苯酐装置操作工(初级)题库
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2009年7月22日上午,我国境内发生了本世纪最为壮观的一次日全食天象。读图回答1—2题。

1、日全食发生时,被全部遮盖的太阳外部圈层是[ ]

A、平流层

B、日冕层

C、 * * 层

D、光球层

2、日全食发生时天空仍然是灰蒙蒙的,与之相关的大气削弱作用主要是[ ]

A、散射

B、反射

C、折射

D、吸收

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A. they think they should have done                B. you have done nothing
C. people try and tell you they are not so bad         D. someone just said to me
E. it’s a time to remember the things 
 
Birthdays are strange things. The more you have, the more you try and pretend they don’t matter, and the more     小题1:  . I’m not really sure why they think so. It’s true that you are getting older, but as     小题2:  , “Who isn’t getting older every day?” The problem may be that a birthday reminds people of all the things     
小题3:  , but have not. I certainly understand that feeling, though I think    小题4:    that I most want to do — a kind of personal re-ordering (重新排序) of the to-do list. What makes you depressed(郁闷) on your birthday is that you realize your re-ordered to-do list is exactly the same as it was last year. That makes you feel     小题5:  , and not been anywhere. I have not had that experience this year. I look back at where I was last year and find things have changed since then.
题型:判断题

人体通过接种,可以获得对某种疾病的抵抗能力,这是下列哪项产生的作用(  )

A.体液的杀菌作用

B.吞噬细胞的吞噬作用

C.皮肤和黏膜的保护作用

D.淋巴细胞产生抗体的作用

题型:判断题

一般职工生活困难补助的管理单位为( )

A.民政组织

B.工会组织

C.党组织

D.人事组织

题型:判断题

右图是DNA的分子结构模式图,请据图回答:

DNA分子复制发生的时间是()和()。

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