下列说法中哪些表示的是时刻( ) A.2008年8月8日晚20:00,第二十九届

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问题:

下列说法中哪些表示的是时刻(  )

A.2008年8月8日晚20:00,第二十九届奥林匹克运动会在北京开幕

B.校运动会100m赛跑的最好成绩是12.8s

C.学校早上8:00开始上课

D.人造地球卫星绕地球运行的最小周期是86min

考点:时刻和时间
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Industrial pollution is not only a problem for the countries of Europe and North America but also an extremely serious problem in some developing countries. For these countries, economic growth is a very important aim. They want to introduce industries, and so they put few controls on the industries which cause pollution.
Cubatao, an industrial town of 85 000 people in Brazil, is an example of the connection between industrial development and pollution. In 1954, Cubatao had no industry. Today it has more than twenty large factories, which produce many pollutants. The people of the town are suffering from the poisonous matter in their environment and the bad effects can be clearly seen. Birth shortcomings are extremely common. Among children and adults, lung problems are sometimes twelve times more common in Cubatao than in other places.
It is true that Brazil, like many other countries, has laws against pollution, but these laws are not enforced strictly enough. It is cheaper for companies to take no notice of the laws and pay the fines than to buy the expensive equipment that will reduce the pollution. It is clear, therefore, that economic growth is more important to the government than to the health of the workers. However, the responsibility does not completely lie with the Brazilian government. The example of Cubatao shows that international companies are not acting in a responsible way either. A number of the factories in the town are owned by large companies from France, Italy, and the US. They are doing things in Brazil that they would not be able to do at home. If they caused the same amount of pollution at home, they would be severely punished or even put out of business.

Why do some foreign companies like to set up their plants in Brazil

A. The investment environment in Brazil is suitable for them.
B. They will not be severely punished if they cause pollution in Brazil.
C. They can make much money because they do not have to pay Brazilian workers much.
D. They can act in an irresponsible way in Brazil because there are no pollution laws there.

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S700K电动转辙机电机中间齿轮应转动灵活,旋转拨动时无()。

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两个完全相同的电热器,分别通有如图所示的交变电流,则它们的功率之比为(   )

A.4:1

B.1:

C.2:1

D.:1

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新建一个文档,插入文件WD06B.DOC的内容。去掉项目符号,行距设置为1.5倍行距。第1行文字下加波浪线,第2行文字加边框,第3行文字加黄色底纹,第4行文字下加着重号。存储为文件WD06C.DOC。

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非少尿型急性肾功能衰竭是指()

A.尿总量超过400ml,尿素氮增高,肌酐正常者

B.尿总量超过500ml,肌酐增高,尿素氮正常者

C.尿总量超过600ml,体液代谢紊乱者

D.尿总量超过700ml,尿素氮增高,体液代谢紊乱者

E.尿总量超过800ml,而尿素氮、肌酐呈进行性增高者

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