(2013江苏东台时堰中学第3阶段检测) 火星重力只约有地球重力的八分之三.The gravity on Mars is only about of on the Earth. 题目和参考答案——青夏教育精英家教网—

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1. (2013江苏东台时堰中学第3阶段检测) 火星重力只约有地球重力的八分之三。

The gravity on Mars is only about of on the Earth.

l.three eighths;that

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3. 你考虑过火星上的低重力吗？

Have you ever on Mars?

5. (2014 江苏泰州，12, ★★★) About of the earth covered with water,but we have less and less available fresh water.

A. three-fourth;is

B. three-fourths;is

C. three-fourth;are

D. three-fourths;are

(B)

Is there intelligent (有智力的) life on other planets? For years,scientists said “no”，or “we don't know”. But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文学家). They believe intelligent life exists (存在) somewhere in the universe.They also think we will soon contact these beings (人;生物) .

Why do Shostak and Barnett think intelligent life exists on other planets? "Fhe first reason is time.Scientists believe the universe is about 12 billion years old.uThis is long enough for other planets to have intelligent life,say Shostak and Barnett.The second reason is size—the universe is huge. “ Tools like the Hubble Telescope (哈勃望远镜) have shown that there are at least 100 billion galaxies,says Shostak.wAnd our galaxy,the Milky Way,has at least 100 billion stars.Some planets going a-round these stars might be similar to Earth.?，

In the past,it was hard to look for signs of intelligent life in the universe.But now,powerful telescopes (高倍望远镜) allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems. These planets might have intelligent life.

Have beings from space already visited Earth? Probably not” says Shostak. “ It's a long way away. However,intelligent beings may contact us in other ways,such as radio signals (信号) .In fact,they may be trying to communicate with us now,but we don't have the right tools to receive their messages. However,this is changing. By 2025,we could make contact with other life forms in our universe and we might help each other."

6. Seth Shostak and Alexandra Barnett are .

A. astronomers B. farmers

C. singers D. drivers

7. What is the best title for Paragraph 2 ?

A. The Age and Size of Earth

B. Our Galaxy：The Milky Way

C. Why Intelligent Life Might Exist

D. Earth;The Only Planet with Intelligent Life

8. Why was it hard to look for signs of intelligent life in the universe in the past?

A. There were not any smaller planets.

B. There were not any powerful telescopes.

C. The astronomers were not interested in them.

D. The Milky Way didn't exist at that time.

9. Why haven’t beings from space visited us yet according to Shostak?

A. They’re afraid of us.

B. It's a long way away.

C. They don't want to see us.

D. They don't know how to use radio signals.

10. What does the underlined phrase “life forms” in the last paragraph mean?

A. Messages. B. Tools.

C. Intelligent beings. D. Radio signals.

Dear Mr President,

I have been doing a project at school recently about animals in danger.! think their living cl are terrible in China. I am writing to you to suggest w 2 we should do to help protect animals more.

I feel so s 3 for the giant panda. It's one of the most popular animals in the world and a s 4 of China. We’ve learned that pandas mainly live on bamboo.I think we should try to do more to p 5 people from destroying their forests.

Another animal we should try to protect more is the Chi-nese alligator (扬子鳄) .They live in some a 6 of eastern China,and now the water there isn’t c 7 enough for them to live in.The government should stop factories from p 8 the lakes and rivers.

If we protect these beautiful animals in China,more people may wish to visit China to see them.They could be an important t 9 attraction. It would be good if more people came to visit our beautiful country,e 10 some quieter places in the country.

I hope you will encourage more people to think about such an important subject.

Yours sincerely,

Huang Jing

1. 2. 3. 4. 5.

6. 7. 8. 9. 10.

4. 他18岁的时候加入了海军。

He at 18.

1. (2015江苏盐城东台创新学校第一次质检) 在2008年北京奥运会上，每当给获胜者颁发奖牌时，颁奖音乐就会响起。

Each time a medal at the 2008 Beijing 0- lympic Games,the award music .

6. There are different designs of (头盗) for us to choose from.

6. Unless you get a drivers (执照) ，you can't drive

a car.

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