多级放大电路的总放大倍数是各级放大倍数的()。A.和; B.差; C.积; D.商。

题型:单项选择题

问题:

多级放大电路的总放大倍数是各级放大倍数的()。

A.和;

B.差;

C.积;

D.商。

考点:电气试验工考试高级电气试验工高级电气试验工题库
题型:单项选择题

In the United States and in many other countries around the world, there are four main ways for people to be (91) about developments in the news: newspapers, magazines, and radio or television news broadcasts. A person may use one, or all, of these (92) for information. Each source is useful in its (93) way. Newspapers and magazines can give much information about a particular event. They may (94) some history of the event, some of its (95) , some of its effects, or perhaps give an (96) or point of view on a particular development. Radio and television can help a person to be well informed about what is happening each day. It is also (97) to listen to radio or watch TV (98) do something else at the same time. Many people can listen to the news on their car radio while driving (99) . For the student of English as a foreign language, an English language newspaper may be the most helpful news source that will also (100) you practice in reading English.
Most daily English language newspapers are not very hard to find. They are interesting and helpful in many (101) . In some of them, you may be able to find news about your (102) country. You will find news and information about important national and international political (103) . (104) what you are interested in, you can probably find something in the newspaper about it. A(n) (105) in the newspaper may help you solve a problem. Other stories may be about good movies, concerts, or TV shows.
Usually, an English language newspaper has several (106) or parts. Each part of the newspaper (107) stories about different kinds of news. Some sections have a lot of advertisements which may be helpful if you want to save money. By reading the advertisements, you may find something you want (108) sale. Or you may find that two stories are advertising the (109) thing, but at one store the price is lower. Other sections may have (110) advertisements or have only a specific type of advertisement to interest the people.

A.advised

B.instructed

C.informed

D.taught

题型:单项选择题

旅游职业道德不仅是每个导游人员在工作中必须遵循的行为准则,也是人们衡量导游人员的职业道德行为和服务质量的标准。

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说明动态读/写存储器的操作步骤。

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矿山救护队的性质?

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申请建立职业技能鉴定所(站)的单位,向()提出申请。

A.劳动保障行政部门

B.职业技能鉴定指导中心

C.国资委

D.教育部

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