放瓦斯预热的目的?
参考答案:
把准备生产的塔体温度升高,不致使塔体温度差变化太大而造成金属热应力急剧变化,从而减少焦炭塔的使用寿命。
急性胰腺炎的非手术疗法包括()。
A.禁食、鼻胃管减压
B.补液、防治休克
C.解痉、止痛
D.抗感染
E.抑制胰腺外分泌及胰酶抑制剂
Who won the World Cup 1994 football game What happened at the United Nations How did the critics like the new play (1) an event takes place, newspapers are on the streets (2) the details. Wherever anything happens in the world, reporters are on the spot to (3) the news. Newspapers have one basic (4) , to get the news as quickly as possible from its source, from those who make it to those who want to (5) it. Radio, telegraph, television, and (6) inventions brought competition for newspaper. So did the development of magazines and other means of communication. (7) , this competition merely spurred the newspapers on. They quickly made use of the newer and faster means of communication to improve the (8) and thus the efficiency of their own operations. Today more newspapers are (9) and read than ever before. Competition also led newspapers to branch out into many other fields. Besides keeping readers (10) of the latest news, today’s newspapers (11) and influence readers about politics and other important and serious matters. Newspapers influence readers’ economic choices (12) advertising. Most newspapers depend on advertising for very (13) . Newspapers are sold at a price that (14) even a small fraction of the cost of production. The main (15) of income for most newspapers is commercial advertising. The (16) in selling advertising depends on a newspaper’s value to advertisers. This (17) in terms of circulation. How many people read the newspaper Circulation depends (18) on the work of the circulation department and on the services or entertainment (19) in a newspaper’s pages. But for the most part, circulation depends on a newspaper’s value to readers as a source of information (20) the community, city, county, state, nation, and world—and even outer space.
[A] inform [B] be informed[C] to be informed [D] informed