(C)
Many people know that rubbish is a big problem on planet Earth. What many people don't know is that junk(垃圾)has become a problem in outer space too.
According to BBC News, there are more than 22, 000 pieces of space junk floating around the earth. And these are just the things that we can see from the surface of the earth by telescopes (望遠(yuǎn)鏡). There are also millions of smaller pieces of junk that we can't see.
Objects, like bits of old space rockets or satellites, move around the planet at very high speeds fast that even a very small piece can break important satellites or become dangerous to astronauts. If the tiniest piece of junk crashed into a spaceship, it could damage the vehicle.
To make things worse, when two objects in space crash, they break into many smaller pieces. For example, when a U.S. satellite hit an old Russian rocket in 2009, it broke into more than 2,000 pieces, increasing the amount of space junk.
To reduce additional space junk, countries have agreed that all new space tools can only stay in space for 25 years at most. Each tool must be built to fall safely into the earth's atmosphere after that time. In the upper parts of the atmosphere, it will burn up.
Many scientists also suggesting different ways to clean up space junk. In England scientists are testing a metal net that can be fired into space junk. The net catches the junk and then pulls it into the earth's atmosphere to burn up. The Germans are building robots that can collect pieces of space junk and bring them back to Earth to be safely destroyed.
The problem is becoming more challenging because we're sending more objects into space to help people use their mobile phones and computers,” says Marco Castronuovo, an Italian space
Researcher.
“The time to act is now. The longer we leave the problem, the bigger it will become,” he says.
36. What does the underlined word “these” in Paragraph 2 refer to?
A. Telescopes.
B. Satellites.
C. Pieces of space junk.
D. BBC news reports.
37. Why is space junk considered a problem?
A. It buns up after it re-enters the atmosphere
B. It often stops the view of telescopes on Earth
C. It could force new space tools to travel at slower speeds
D. It may crash into other space tools causing damage or deat
38. Countries want future space tools to be able to fall back into the earth's atmosphere so that .
A. the tools can be reused later
B. the tools don't become space junk
C. the earth’s atmosphere can stay clean
D. the effects of space flight can be studied
39. How do the Germans plan to deal with space junk?
A. Catch it with nets.
B. Use robots to collect it.
C. Burn it in the earth's atmosphere.
D. Send it further away from the earth.
40. In which section of the newspaper would you probably read this article?
A. Environment.
B. Local News.
C. Education.
D. Fashion.
(D)
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1.Women in Science by Rachel Ignotofsky Price $25 We all know the story of Marie Curie and her many scientific achievements. But many other brilliant female scientists are far less well known. This book is a great introduction to the lives and works of some of the most important and up-to-now unknown women in science. Recommended for Ages: 12-15 Order Now |
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2. First Big book of How by Jill Esbaum Price $15 An excellent book about sea life for young children. The book is divided into 4 parts, one for each of the Pacific, Atlantic, Indian and Arctic oceans. It focuses on the different animals found in each of these seas, along with interesting facts and amazing pictures. Ages: 5-10 Order Now |
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3. A Really Short History of Nearly Everything by Bill Bryson Price $15 Bill Bryson takes readers on a very funny and educational trip through the history of modern science-from its unexpected successes to its great failures and everything in between. Ages: 14 and over Order Now | |
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4. National Geographic's First Big Book of the World by Jan Carn. Price $20 This book is the perfect introduction to the seven continents. It tells young readers about the different animals that live on each of these lands and gives a simple description of the people's history and culture. Ages: 5-12 Order Now | |
41. How are the books on this webpage listed?
A. By price.
B. By popularity.
C. By reader’s age.
D. By writer’ s name.
42. What is true about the book Women in Science?
A. It is mainly about Marie Curie's history.
B. It lists all the important scientific achievements.
C. It includes women scientists that aren’t famous.
D. It is mostly about the development of modem science.
43. How much will a Bestbooks Book Club member pay in total if he orders First Big Book of How and A Really Short History of Nearly Everything today?
A. $34.
B. $30.
C. $26.
D. $24.
44. A primary school student who needs to write a science report about African elephants should choose .
A. Women in science
B. First Big Book of How
C. A Really Short History of Nearly Everything
D. National Geographic's First Big Book of the World
45. What is the main purpose of this webpage?
A. To sell books to young readers.
B. To attract new book club members.
C. To encourage students' interest in science.
D. To review books young readers might like.
，我們將會(huì)及時(shí)處理。
