()就是使用灭火剂与链式反应的中间体自由基反应,从而使燃烧的链式反应中断使燃烧不能持

题型:单项选择题

问题:

()就是使用灭火剂与链式反应的中间体自由基反应,从而使燃烧的链式反应中断使燃烧不能持续进行。

A.窒息灭火

B.隔离灭火

C.冷却灭火

D.化学抑制灭火

考点:安全工程师安全生产技术安全生产技术1
题型:单项选择题

阅读理解

     Good afternoon, ladies and gentlemen. My topic is "__________".

     Now in the 21st century, advertising is more and more important for people. Why? I think it is because through advertising, people, especially the businessmen, can introduce their products to the people all over the world. Because of this, many companies spend a lot of money on advertising. As we all know, there are many advertisements which are very interesting and popular. For example, Michael Jordan made an interesting advertisement for Nike. From this you can see how the companies make their products known to the world.

     People can make a lot of money through advertising. It is known that many famous singers and movie stars make money in this way. However, I don't think this is a good way for them to make money, because they are not the professional(职业的) advertisers, especially those who advertise in medicine advertisements.

     Nowadays, advertising not only means making the products known, but also means making ourselves known to people around us. Living today, we have to make people believe in us if we want to do important jobs. But how can this be done? We should first let other people know our good side: the good habits and abilities we have. In short, we should always remember to advertise ourselves to others. As I said before, advertising is not only important for companies but also for everyone, for all human beings. This is the most interesting thing about advertising.

1. The best topic to fill in the line in the first paragraph is "__________".

A. The Importance of Advertising

B. Making Money through Advertising

C. Advertising Ourselves

D. Advice on Advertisements

2. This passage may be a(an) __________.

A. advertisement

B. story

C. speech

D. report

3. According to the passage, which of the following is NOT right?

A. Many companies are willing to spend money on advertising.

B. Advertising can make some people rich.

C. People can introduce their products through advertisements.

D. Advertising is not necessary for anyone.

题型:单项选择题

Liu Qian, a magician for Taiwan, ______ audience of thousands on the 2009 CCTV Spring Festival Show.

A.appealed to

B.applied for

C.approved of

D.appointed with

题型:单项选择题

在印度洋南部的克格伦岛上经常刮起大风,生活在这里的昆虫多数翅膀退化,不能飞行,少数能飞的昆虫翅膀却异常发达,对这种两极分化现象的合理解释是

A.自然选择

B.生来如此

C.遗传与变异

D.用进废退

题型:单项选择题

以下构成终止的理由有()。

A、条约被代替

B、条约执行对象永久消失

C、情势变迁

D、谈判代表受贿

题型:单项选择题

治疗邪入营血时,叶氏提出:急急透斑:主要是用:().

A.辛凉提透法

B.辛温透邪法

C.轻清宣透法

D.清热凉血法

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