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 (綜合征).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 (環(huán)繞軌道運(yùn)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.(客觀的)       C.Supportive       D.Disagreeing.

分析 本文主要講述太空垃圾太多,引起很多問題,該如何解決.

解答 DCCB
27  D  細(xì)節(jié)理解題.從第二段第一句判斷,space junk指人類在太空活動(dòng)中遺留在太空的所有的物體,即"太空垃圾".
28 C 細(xì)節(jié)理解題.從第二段It is named after the American scientist who first thought of the idea in 1978可知Kessler 是第一個(gè)提出太空垃圾綜合征的科學(xué)家,故選C.
29  C 主旨大意題.通讀全文可知,本文介紹了太空垃圾及其危害,還介紹了科學(xué)家正在研究清理太空垃圾方法的情況,故C項(xiàng)最能概括全文的內(nèi)容.
30  B  推理判斷題.作者在文中只是客觀介紹Castronuovo提出的清理太空垃圾的方法,沒有做任何評(píng)論,因此其態(tài)度是客觀的.

點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力,做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確的選擇.在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí),要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷.

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