将下列作品同对应作者连线： 《皇帝的新装》 　 韩愈 《从百草园到三味

— _________ is it from here to your home town?

— Well, it takes over three hours to get there by car.

A．How soon

B．How much

C．How long

D．How far

下列说法错误的是（　　）

A．运动员举着杠铃不动，他对杠铃做了功

B．石块下落的过程中，重力对石块做了功

C．汽车拉着物体在水平路面上行走，汽车对物体的支持力不做功

D．射击时燃烧的气体对子弹做了功

阅读理解。

     Space is a dangerous place, not only because of meteors (流星) but also because of rays from the

sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through,

and this is essential (不可缺少的) for plants to make the food which we eat. Heat, too, makes our

environment endurable. Various kinds of rays come through the air from outer space, but enormous

quantities of radiation from the sun are screened off (用屏幕隔开). As soon as men leave the

atmosphere, they areexposed to this radiation but their spacesuit or the walls of their spacecraft, if they

are inside, do prevent a lot of radiation damage.

    Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem".

Scientists have reason to think that a man can put up with far more than 0.1 rem without being damaged;

the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about

radiation damage - a person may feel perfectly well, but the cells of his or her sex organs may be

damaged, and this will not be discovered until the birth of deformed (畸形的) children or even

grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the

outward and return journeys, the Apollo crew accumulated (积累) a large amount of rems. So far, no

dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We

simply don't know yet how men are going to get on when they spent weeks and months outside the

protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage

done by radiation, but no really effective ones have been found so far.

1.  According to the first paragraph, the atmosphere is essential to man in that ________. 

A. it protects him against the harmful rays from space

B. it provides sufficient (充分的) light for plant growth

C. it supplies the heat necessary for human survival

D. it screens off the falling meteors

2. The harm radiation had done to the Apollo crew members ________.

A. is insignificant (不重要的)        

B. seems overestimated

C. is enormous                      

D. remains unknown

3. It can be inferred from the passage that _________.  

A. the Apollo mission was very successful  

B. protection from space radiation is no easy job

C. astronauts will have deformed children or grandchildren

D. radiation is not a threat to well-protected space explorers

4. The best title for this passage would be ______. 

A. The atmosphere and Our Environment  

B. Research on Radiation              

C. Effects of Space Radiation            

D. Importance of Protection Against Radiation

反应系统氮气气密合格后即可以进行催化剂硫化。