气态污染物有动力采样包括()法、()法和()法。

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问题:

气态污染物有动力采样包括()法、()法和()法。

考点:环境监测上岗考试环境空气采样环境空气采样题库
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一个由高速缓冲存储器与主存储器组成的二级存储系统,已知主存容量为1M字,高速缓存容量为32K字。采用组相联地址映象与变换,缓存共分8组,主存与缓存的块的大小均为64字。

假设缓存的存取周期为20ns,命中率为0.95,采用缓存后的加速比要达到10,计算主存的存取周期。

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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.on

B.through

C.under

D.of

题型:填空题

已知甲醛分子中4个原子是共平面的,下列分子中所有原子不可能同时存在于同一平面上的是()。

A.A

B.B

C.C

D.D

题型:填空题

事故后果是指事故中人员伤亡以及房屋、设备、物资等的财产损失,不考虑( )。

A.动物死亡

B.植物死亡

C.生态破坏

D.停工损失

题型:填空题

青岛社保卡如何激活?激活后可以变更发卡银行吗?

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