地震中遇到火灾该怎么办?

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问题:

地震中遇到火灾该怎么办?

考点:全民健康知识竞赛全民健康知识竞赛题库
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牡丹皮药材含

A.簇晶
B.砂晶
C.针晶
D.方晶
E.菊糖

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阅读理解:根据短文内容,选择最佳答案。

     Do you think that the population may be the greatest one of the world today? 2000 years ago, the world's

population was very small. For several thousand years, it grew quite slowly. But during the last three or four

hundred years, it has grown very quickly. Today it is growing faster than ever before. 

     In one minute, nearly 200 babies will be born in the world. Just think how many more there will be in one

year!

     A U.N report says that the population of the more developed countries was 1,214 million in 1990 and it will

be 1,274 million by the end of the twentieth century, while the population of the less developed countries was

4,107 million in 1990 and it will be over 5,000 million by 2002. It is said that by the year 2010, the world's

population may be 7 billion. This means much more food must be produced. We must have smaller families with

fewer, but healthier children. If we don't do like this, there will not be enough space for anybody else to stand

in on the earth.

1. 2000 year ago, the world's population was very ________. [ ]

A. much

B. many

C. small

D. large

2. During the last three or four hundred years, the population has grown very _____. [ ]

A. slowly

B. quickly

C. few

D. little

3. How many babies will be born in the world in one minute? [ ]

A. 4,107

B. 200

C. 1,214

D. 1,274

4. According to the U.N. report, the population of the more developed countries was ______ million in 1990. [ ]

A. 1,274

B. 1,214

C. 2000

D. 4,107

5. People say that by the year 2010, the world's population will be ______ billon [ ]

A. 5

B. 1,274

C. 7

D. 1,214

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试带法测定尿酮体,错误的是 ()

A.采用硝基铁氰化钠法

B.本法对酮体的灵敏度乙酰乙酸最高

C.与β-羟丁酸不发生反应

D.测定时应使用新鲜尿液标本

E.干化学检测所得结果与实际总的酮体量一致

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袋收尘按清灰装置的工作原理及结构特点分为:()式和()式两种。

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加强计量监督管理,保障国家计量单位制的统一和量值的准确可靠,有利于生产、贸易和科学技术的发展,适应社会主义现代化建设的需要,维护国家、人民的利益是《计量法》的( )。

A.根本目的

B.基本作用

C.立法宗旨

D.立法原则

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