题目列表(包括答案和解析)
When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.
Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth’s atmosphere (大气). Light is “bent (弯曲的)” when it travels through different parts of the earth’s atmosphere. As the air in the earth’s atmosphere is moving all the time, the light from the stars looks as if it is moving too.
The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.
This twinkling effect causes a lot of problems for astronomers (天文学家) since they cannot observe the stars clearly. A telescope (望远镜) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.
根据短文内容,选择最佳选项。 (10分)
1.What happens to the light from the stars we see when the air in the earth’s atmosphere is moving?
A.It looks even brighter.
B.It looks as if it is bent.
C.It looks as if it is moving.
D.It looks like drops of rain.
2.Scintillation also happens on according to the passage.
A.rainy days B.shiny days
C.cloudy days D.windy days
3.What can you see when you drop a rock into the water?
A.The rock gets broken.
B.The rock becomes unclear.
C.The water becomes much polluted.
D.The water does not move anymore.
4.The underlined word “observe” means “ ”.
A.watch B.listen C.draw D.explain
5.Why is scintillation a problem for astronomers?
A.The stars never stay still.
B.It makes the stars too dark to see.
C.It makes astronomers feel too hot to work.
D.Astronomers cannot observe the stars clearly.
When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.
Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth’s atmosphere (大气). Light is “bent (弯曲的)” when it travels through different parts of the earth’s atmosphere. As the air in the earth’s atmosphere is moving all the time, the light from the stars looks as if it is moving too.
The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.
This twinkling effect causes a lot of problems for astronomers (天文学家) since they cannot observe the stars clearly. A telescope (望远镜) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.
根据短文内容,选择最佳选项。 (10分)
【小题1】What happens to the light from the stars we see when the air in the earth’s atmosphere is moving?
| A.It looks even brighter. |
| B.It looks as if it is bent. |
| C.It looks as if it is moving. |
| D.It looks like drops of rain. |
| A.rainy days | B.shiny days |
| C.cloudy days | D.windy days |
| A.The rock gets broken. |
| B.The rock becomes unclear. |
| C.The water becomes much polluted. |
| D.The water does not move anymore. |
| A.watch | B.listen | C.draw | D.explain |
| A.The stars never stay still. |
| B.It makes the stars too dark to see. |
| C.It makes astronomers feel too hot to work. |
| D.Astronomers cannot observe the stars clearly. |
Beijing's hotel industry is gearing up(快速发展)to serve the 2008 Olympic Games. Seven five-star hotels signed an Olympic Lodging(住宿)Agreement with Beijing Organizing Committee for the 2008 Olympic Games(BOCOG).
The seven hotels include Beijing Hotel, China World Hotel, Grand Hotel Beijing, Hong Kong Macao Center Swiss Hotel, Beijing International Hotel, Kunlun Hotel and Crowne Plaza View Wuzhou Beijing.
According to the Olympic Lodging Agreement, the seven hotels will provide(提供)accommodation to accredited(官方派出的)people from the Olympic Family, the sponsors(赞助商)and the media(媒体). At the time of the 2008 Games, the seven hotels are to keep a total of over 3,500 rooms available to BOCOG.
In line with the Olympic Charter and the Host City Contract, BOCOG will have to provide 22,000 suitable hotel rooms for accredited people during the Games period, BOCOG is expected to sign the same agreement with some 70 more star hotels this year to ensure(确保)that a total of 23,000 hotel rooms will be made available during the Games.
(1) BOCOG is trying to find ________ for the Olympic Games.
[ ]
(2) The seven hotels have ________ 3,500 available rooms in all.
[ ]
(3) At least ________ more rooms are being looked for by BOCOG.
[ ]
(4) From the text we know that BOCOG ________ for the 2008 Games.
[ ]
(5) The prepared rooms are not for ________.
[ ]
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