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In 1997,Lottie Williams was walking through a park in Oklahoma,the US,with her friends.Suddenly something fell on her shoulder and then to the ground.She picked it up.It was about as heavy as a tennis ball.Later,scientists told her it was a piece of a Delta II rocket that had been used to launch a satellite.
   Many countries around the world have sent satellites into space.We need satellites to send and receive TV and radio signals to report the weather and for many other purposes.But when they become old or break down,we just leave them there.Some of them are still in space and become space rubbish.
   It is said that there are about 16,000 objects larger than 10 centimeters wide flying around the earth and millions of smaller objects,too.They travel at around 7 kilometers a second.That's too fast!And it's their speed that makes these pieces of space rubbish really dangerous.If one small piece of space rubbish hits something at a high speed,it can do a lot of harm.Luckily,that hardly ever happens because of scientists' careful designs.But in 2009,an old Russian satellite hit an American satellite and created about 2,000 pieces of space rubbish!
   Sometimes pieces of space rubbish enter the earth's atmospher again and then drop to the ground.Lottie Williams is perhaps the only person who has been hit so far.Most space rubbish burns up and doesn't reach the earth.In 2011,a 35-centimeter-wide metal ball fell to the earth in Namibia,Africa.It made a hole in the ground 30 centimeters deep and over 3.3 meters wide.Lottie was lucky she wasn't hit by it!

(1)What does the underlined word "something" in Paragraph 1 refer to?
C
C

A.A tennis ball.
B.A UFO.
C.A piece of a rocket.
D.A piece of a satellite.
(2)Why do most pieces of space rubbish hardly ever do any harm to people's life?
C
C

A.Because they are only small pieces.
B.Because they travel at a low speed.
C.Because scientists design carefully.
D.Because scientists burn them up with fire.
(3)When did the old Russian satellite hit the American satellite?
B
B

A.In 1997.
B.In 2009.
C.In 2011.
D.In 2020.
(4)What does the underlined word "atmosphere" in the last paragraph mean in Chinese?
B
B

A.黑洞
B.大氣層
C.生物圈
D.巖石圈
(5)What is the main purpose of the passage?
A
A

A.To help people understand what space rubbish is.
B.To tell what people can do to keep away from space rubbish.
C.To talk about the dangers of space rubbish.
D.To tell the history of space rubbish.

【答案】C;C;B;B;A
【解答】
【點評】
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發(fā)布:2024/5/27 14:0:0組卷:3引用:1難度:0.5
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