题目内容
3.Sometime early in the next century,human beings will move to Mars.They will live there for about a year,and then will be replaced with another group of pioneers.Building the base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth.We already know that Mars resembles the earth in many aspects:general size,presence of water,length of day,range of temperatures.These resemblances have caused many people to consider a centuries-long project:to terraform Mars.Terraforming means altering a planet's surface so that Earth's life forms can survive there.This concept,previously found only in science fiction is now being seriously considered by scientists.
Terraforming Mars is theoretically simple:add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth's plants and animals in the order in which they developed on Earth.But it will take at least 300years.
Some people think that such a project is too huge for humans to undertake,but there are very good reasons to make the attempt.The earth now contains some 6billion people,and no one has any idea of how many humans the earth can support.Our very existence and numbers are threatening many other species.We also have had some experience with terraforming our own planet:altering the landscape,the atmosphere and the climate.Currently terraforming earth has become a wiser activity as we try to control global warming,air and water pollution,and preserve some natural living places.
While the possibility of such a project is small,it is not impossible.Even if earth-bound societies come and go in the next 300years,the project can continue through the work of the Mars settlers without the need for constant backing from the earth.
The future existence of all the people in our world may very well depend upon our ability to terraform Mars.
63.What would be the best title for this passage?A
A.Terraforming Mars. B.Saving the Earth.
C.Travelling to Mars. D.A Newly-found Place.
64.What does the underlined word"altering"mean in the second paragraph?B
A.warming. B.changing.
C.planting. D.building.
65.According to the passage,the main purpose of terraforming Mars is toD.
A.do some scientific research work
B.find out its similarity to earth
C.avoid the dying away of many other species
D.find on Mars living place for the increasing human beings
66.The main reason for causing many people to consider terraforming Mars is thatA.
A.there are some resemblances between Earth and Mars.
B.terraforming Mars is theoretically simple
C.we have had some experience with terraforming our own planet:Earth
D.the development of science and technology is very rapid.
分析 本文围绕着人类移民火星而展开论述.首先从火星与地球的相似之处讲到移民火星在理论上的可行性以及搬迁过程,继而又谈论了人类因人口的急剧增加而向外层空间发展的必要性.最后分析了人类科技的发展和成就大大增加了使火星适合人类居住和人类移民火星的可能性.
解答 63--66 ABDA
63.A 主旨大意题.根据首段提出human beings will move to Mars可知,然后围绕此话题展开论述,所以文章中心应该是将火星地球化问题.帮选A.
64.B 词义猜测题.根据后句so that Earth's life forms can survive there可知,可判断为了让地球上的生命能在火星上存活,就要改变火星上的条件以便更适合地球上生命的生长.故选B.
65.D 推理判断题.根据第二段Terraforming means altering a planet's surface so that Earth's life forms can survive there可知,使火星地球化的目的是让地球上生命能在火星上存活.故选D.
66.A 细节理解题.根据第二段Mars resembles the earth in many aspects…和 These resemblances have caused many people to consider a centuries-long project:to terraform Mars可知,火星我地球有许多相似的地主.故选A.
点评 新闻一般采用"倒金字塔"式结构(即先说结果,再说重要事实,最后说次要内容),但有的通讯叙述方比较灵活多变,有顺叙、倒叙、中间或许还会有插叙、补叙等叙述方法,这就要求我们在阅读时特别关注.必须在十分有限的时间内运用略读、扫读、跳读等技巧快速阅读,搜寻关键词、主题句,捕捉时空、顺序、情节、人物、观点,并且理清文章脉络,把握语篇实质.
![](http://thumb.zyjl.cn/images/loading.gif)
Research is preliminary,but several studies(38)Cpeople who spend most of their days sitting are more likely to be fat,have a heart attack or even die.
In an editorial(39)Dthis week in the British Journal of Sports Medicine,Elin Ekblom-Bak of the Swedish School of Sport and Health Sciences suggested that authorities rethink how they define(40)Bactivity to highlight the dangers of sitting.
While health officials have issued guidelines(41)Cminimum amounts of physical activity,they haven't suggested people try to limit how much time they spend in a seated(42)D
"After four hours of sitting,the body starts to send(43)Asignals,"Ekblom-Bak said.She explained that genes regulating the amount of glucoseand fat in the(44)Cstart to shut down.
Even for people who(45)D,spending long stretches of time sitting at a desk is still harmful.Tim Armstrong,a physical activity expert at the World Health Organization,said people who exercise every day(46)Cstill spend a lot of time sitting-might get more benefit if that exercise were spread across the day.(47)Ain a single bout.
That wasn't(48)Dnews for Aytekin Can,31,who works at a London financial company,and spends most of his days sitting(49)Ca computer.Several evenings a week,Can also teaches jiu jitsu,a Japanese martial art(50)Bwrestling,and also does Thai boxing.
"I'm sure there are some detrimental(51)Aof staying still for too long,but I hope that being(52)Bwhen I can helps,"he said."I wouldn't want to think the sitting could be(53)Ddangerous."
Still,in a study published last year that tracked more than 17,000 Canadians for about a dozen years,researchers found people who sat(54)Chad a higher death risk,independently of whether or not they exercised.
Figures from a US survey in 2003-2004 found Americans spend more than half their time sitting,from working at their desks to sitting in cars.
Experts said more research is needed to(55)Djust how much sitting is dangerous,and wha t might be possible to offset those effects.
36.A.bad | B.good | C.mean | D.dead |
37.A.does | B.occurs | C.matches | D.dies |
38.A.advise | B.talk | C.suggest | D.say |
39.A.thrown | B.caught | C.seen | D.published |
40.A.biological | B.physical | C.psychological | D.logical |
41.A.commending | B.mending | C.recommending | D.communicating |
42.A.stand | B.state | C.post | D.position |
43.A.harmful | B.careful | C.wonderful | D.skillful |
44.A.head | B.arm | C.body | D.foot |
45.A.sleep | B.rest | C.walk | D.exercise |
46.A.and | B.so | C.but | D.then |
47.A.rather than | B.other than | C.more than | D.less than |
48.A.bad | B.harmful | C.disadvantage | D.welcome |
49.A.behind | B.back | C.in front of | D.forward |
50.A.referring | B.involving | C.taking | D.bringing |
51.A.effects | B.prefects | C.affects | D.offers |
52.A.inactive | B.active | C.interactive | D.positive |
53.A.such | B.little | C.lot | D.that |
54.A.less | B.fewer | C.more | D.further |
55.A.leave out | B.bring out | C.hold out | D.figure out |