题目内容

 Jupiter(木星)is the fifth planet from the sun and it is the largest one in the solar system. It is about 11 times bigger than the earth. Jupiter's strangest thing is its huge red spot. Pictures taken from space tell us that the red spot is probably a hurricane (腿风).It is so big that the earth would fit right in the middle of it. Sometimes the hurricane looks like a huge oven with orange-red waves (波).Other time the color almost disappears.

  On the earth,hurricanes move. We can watch them travel across water to land. Jupiter's red spot also moves. Scientists say it "walks". It is carried along by air in Jupiter's atmosphere(大气层).

  So far,Jupiter has been visited by four spacecrafts. All of them flew by Jupiter very quickly. On the next trip to Jupiter,spacecraft will stay near the planet much longer. New information will be sent back to the earth. Soon scientists will know much more about this strange red spot in the atmosphere.

根据短文内容,选择正确答案。

(   ) 1. According to the passage , Jupiter's huge red spot is probably_______ .

A.  a big stone

B.   a huge ocean

C.   a hurricane

D.  red soil

(   ) 2. Jupiter is the _____  planet from the sun in the solar system.

A. eighth    B. sixth

C. third    D. fifth

(   ) 3. Compared(比较)with the size of the earth,Jupiter's red spot is      

A.  smaller

B.  the same size

C.  larger

D.  11 times bigger

(   ) 4. Earth's hurricanes are like Jupiter's red spot because they both______ .

A.  move

B.   have the same size

C.   move at the same speed

D.  have the same colour

(   ) 5. According to the passage,it would be right to say that_______ .

A.  scientists have learned everything about Jupiter

B.  Jupiter is much smaller than the earth

C.  spacecraft trips help scientists learn more about Jupiter

D.  Jupiter is a star just like the sun

1. C  由第一段第四句可知红色的斑点可能是飓风。

2. D

3. C   由第一段第二句和第五句可知木星上的飓风比地球上大很多。

4. A

5. C   由最后一段最后两句可知宇宙飞船能帮助科学家们了解更多关于木星的知识。

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 The Earth has warmed by about half a degree(0. 5^ ) over the last 100 years. It could be getting warmer on its own , but many scientists think that people are making the Earth warmer by making a greenhouse effect. The greenhouse effect is important. Without it,the Earth would not be warm enough for us to live on. But just a little warmer than it is now could cause problems for humans , plants and animals.

   Many of the things we do every day can change the Earth's temperature by sending greenhouse gases into the air. We send greenhouse gases into the air when we watch TV , turn on lights , dry hair , play video games , wash or dry our clothes or drive cars. The rubbish ( waste ) from factories and homes also produces greenhouse gases.

Even a small change in temperature can affect our weather. This can cause changes in the sea levels, the air,flooding, and our fresh water.

    The change in the temperature can also cause changes in the living places for animals and plants, endangering many animals.

    Global warming (全球变暖)is a big problem, and every little bit we do can help. We can save electricity. We can save energy in other ways such as by taking buses or walking rather than driving cars. We can recycle to reduce the rubbish and save natural resources such as trees, oil and metals. We can buy products that don't do bad to the environment and we can turn to 、solar energy. Remember the little bit that you do will bring a better world.

根据短文内容,选择最佳答案。

(   ) 1. Without the greenhouse effect , we would _______

A.  not be able to live

B.  be safer

C.  have a cleaner earth

D.  have a better world

(   ) 2. Which of the following does not send greenhouse gases into the air?

A.  Turning on a light.

B.  Walking to school.

C.  Driving a car.

D.  Watching TV.

(   ) 3. The writer gives us advice on how to save energy in      

A.  Paragraph 2

B.  Paragraph 3

C.  Paragraph 4

D.  Paragraph 5

(   ) 4. Global warming is a big problem but

A.  we can't do anything to help

B.  we don't need to do anything

C.  we can do something to help

D.  we can do something to stop it

(   ) 5. In this passage, the scientists are mainly trying to make the readers
realize      

A. the earth could be getting warmer by itself

B.  the earth is getting warmer in 100 years

C.  the greenhouse effect is important

D.  humans are making the earth warmer

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