格栅的工作原理是什么?

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问题:

格栅的工作原理是什么?

考点:油气田水处理工考试油气田水处理工技师考试油气田水处理工技师考试题库
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马克思说:“工人的巴黎及其公社将永远作为新社会的光辉先驱受人景仰。”因为巴黎公社(   )

A.在打碎资产阶级国家机器方面提供了有益经验

B.是在马克思主义理论指导下的第一次伟大尝试

C.是人类历史上第一次获得胜利的社会主义革命

D.标志着无产阶级第一次登上世界政治历史舞台

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Part 4


Questions 26-45


·Read the following text and decide which answer bestfits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

Newspapers


Who won the World Cup 1994 football game What happened at the United Nations How did the critics like the new play When an event takes place, newspapers are on the streets (26) the details. (27) anything happens in the world, reporters are on the spot to (28) the news.
Newspapers have one basic (29) to get the news as quickly as possible from its source, from those who make it to those who want to (30) it. Radio, telegraph, television, and (31) inventions brought competition for newspapers. So did the development of magazines and other means of communication. (32) this competition merely spurred the newspapers on. They quickly made (33) of the newer and faster means of communication to improve the speed and (34) the efficiency of their own operations. Today more newspapers are printed and read than ever before.
Competition also led-newspapers to branch out into many other fields. Besides keeping readers (35) of the latest news, today’s newspapers (36) readers about politics and other important and serious matters. Newspapers influence readers’ economic choices (37) advertising. Most newspapers depend on advertising for their very (38) Newspapers are sold at a price that (39) to cover even a small fraction of the cost of production. The main (40) of income for most newspapers is commercial advertising. The (41) in selling advertising depends on a newspaper’s value to advertisers. This is measured (42) circulation. How many people read the newspaper Circulation depends (43) on the work of the circulation department and on the services or entertainment (44) in a newspaper’s pages. But for the most part, circulation depends on a newspaper’s value to readers as a source of information (45) the community, city, country, state, nation, and world—and even outer space.

A.Wherever

B.Whoever

C.Whatever

D.Whichever

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女,38岁,已婚已育。现月经延期15天,伴恶心呕吐。妇科检查:宫口闭,子宫正常大小,两侧附件阴性。首选的处理方法是()

A.B超盆腔检查

B.口服甲羟孕酮

C.尿妊娠试验

D.基础体温测定

E.血孕酮测定

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疫毒痢内闭外脱的治法是:()

A.扶正固脱,潜阳熄风

B.回阳救逆,补肾益气

C.熄风镇惊,救逆固脱

D.培元益气,补肾温阳

E.健脾补肾,熄风开窍

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工程设计和维护中都计算信噪比都非常重要,计算信噪比的公式为OSNR=Pout–10logM-L+58-NF–10logN。下面关于信噪比描述错误的是()

A、M为WDM系统的复用通路数

B、L为任意两个光放大器之间的距离

C、NF为光放大器EDFA的噪声系数

D、N为WDM系统合、分波器之间的光放大器数目

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