题目内容

10.A camera,a glove,a hand tool,even a toothbrush…they are all up there,above the clouds,going around and around the Earth.There are also thousands of pieces of metal and plastic.Some of them are only about the size of a fingernail.Many are much larger.Scientists consider all these objects to be space junk,and they are a problem.
Since people first launched rockets into space in the 1950s,we have been leaving behind all sorts of things.Much of the space junk is made up of little pieces of things that were once bigger objects,until they struck each other and broke apart.Sometimes larger pieces survive the extreme heat through the atmosphere and hit the ground or the ocean at great speeds.
But space junk falling on housetops is not the biggest worry.Scientists are concerned about the Kessler syndrome (综合征).It is named after the American scientist who first thought of the idea in 1978.Imagine what happens when an empty rocket strikes another while orbiting (环绕轨道运行) the Earth.Two big things become many smaller things.They then hit other things.The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.
Marco Castronuovo,an Italian Space Agency researcher,suggested launching a satellite into space that would get very close to some of the larger pieces of space junk.The satellite would connect a small rocket to the useless object.When the rocket explodes,it pushes the junk into a lower and slower orbit,nearer the Earth.After a time,the junk burns up in the atmosphere.
Scientists have been concerned about space junk for many years.Right now,the costs of the clean-up have been too great.Mr.Castronuovo says his system could be put in place for a much more reasonable amount of money.

27.What does the underlined part"space junk"in Paragraph 1refer to?D
A.It refers to small pieces of things that were once bigger objects.
B.It refers to objects that survived the extreme heat through the atmosphere.
C.It refers to clouds that are made up of small objects in space.
D.It refers to all kinds of objects that have been left behind in space.
28.Which of the following statements is TRUE?C
A.Scientists consider all the objects in space as space junk.
B.Space junk will never fall on our housetops.
C.Kessler was the first scientist who came up with the idea of space junk syndrome.
D.The cost of the clean-up with Marco Castronuovo's method has been too great.
29.What is mainly talked about in the passage?C
A.Smaller objects come together to form clouds of space junk.
B.Human beings are responsible for space junk.
C.Space junk is a big problem human beings have to find ways to solve.
D.An Italian researcher has found a good way to remove space junk.
30.What is the author's attitude towards Mr.Castronuovo's method of cleaning up space junk?B
A.Doubtful.B.Objective.(客观的)       C.Supportive       D.Disagreeing.

分析 本文主要讲述太空垃圾太多,引起很多问题,该如何解决.

解答 DCCB
27  D  细节理解题.从第二段第一句判断,space junk指人类在太空活动中遗留在太空的所有的物体,即"太空垃圾".
28 C 细节理解题.从第二段It is named after the American scientist who first thought of the idea in 1978可知Kessler 是第一个提出太空垃圾综合征的科学家,故选C.
29  C 主旨大意题.通读全文可知,本文介绍了太空垃圾及其危害,还介绍了科学家正在研究清理太空垃圾方法的情况,故C项最能概括全文的内容.
30  B  推理判断题.作者在文中只是客观介绍Castronuovo提出的清理太空垃圾的方法,没有做任何评论,因此其态度是客观的.

点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.

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