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The planets aren’t the only wanderers(漫游...

The planets aren’t the only wanderers(漫游者) of the sky. There’re some things even farther and longer. Long after people were no longer afraid of planets, they still thought the comets(彗星) were bad objects that traveled in the sky. They were afraid that the comets would suddenly land on the earth and hurt them.

But, in fact, even if a comet did hit the earth, nothing much happened. A comet is really a harmless (无害的)thing.

Comets have round heads and long tails , and they are very bright. Sometimes they look like heads with long hair flying with them. That’s why they’re called comets. Comet means long-haired.

Like the stars and planets, comets are far away. But we can know its size. The head of a small comet is as wide as the 学科网(www.zxxk.com)--教育资源门户,提供试卷、教案、课件、论文、素材及各类教学资源下载,还有大量而丰富的教学相关资讯!Pacific Ocean. And a big comet’s head is ten times as big as the earth. Its tail is millions of kilometers long. Then why wouldn’t the great big thing hurt us if it hit the earth? Because it isn’t solid. It’s thin like cloud. Its tail is nothing but bright gas. And its head is made of small pieces and they could not hurt the earth.

Some comets can be seen for a few months. Then they go away. Some of them come back in a certain number of years. Some are never seen again.

Perhaps these comets that never return have broken into pieces. For some astronomers think that shooting stars(流星) are pieces of broken comets.

1.People were afraid ________.

A. comets are different from planets

B. comets travel in the sky

C. comets are much bigger than the earth

D. comets could hit the earth

2.Comets have long tail like ________, so we call them comets.

A. long hairB. round headsC. round dishes   D. wide wings

3.From the passage we know the tails of comets are made of  ________.

A. waterB. solidC. gasD. small stones

4.The underlined word “astronomers” may mean ________ in Chinese.

A. 心理学家B.艺术家C. 天文学家D. 考古专家

5.Which of the following is TRUE ?

A. A comet is a kind of planets.

B. Comets are all ten times as big as the earth.

C. People can hardly see comets.

D. Shooting stars may come from the broken comets.     

 

1.D 2.A 3.C 4.C 5.D 【解析】 试题分析:短文大意:这篇短文主要讲述了彗星名称的由来,以及彗星的结构。告诉我们彗星之所以不会撞到地球,是因为彗星是又气体构成的。 1. 2. 3. 4. 5. 考点:考查科普环保类阅读
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Once there lived two brothers. The elder was called Simon and the younger was Victor. They always          each other. Every day they worked from morning         night, getting as much grain谷物 as possible from their fields.

One late autumn evening, after their work was done, Simon said to his wife, "Victor got married last month. He has many bills to       . I think I will put a bag of rice in his barn谷仓." "Oh, that's a good idea," said his wife. "But please don't tell him," said Simon, "If he knows I put the rice there, he will       take it.”

So, late that night Simon took a bag of rice to Victor's barn. The next day, while looking at his own barn, he was surprised. "I took a bag of rice to Victor's house last night,      I still have

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Simon decided to take       bag of rice to his brother's barn that night. But the next morning, he found the same number of bags in his barn again! "This is very strange," he thought.

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