首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might【B1】______into earth and destroy life as we kn
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might【B1】______into earth and destroy life as we kn
admin
2010-01-21
43
问题
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might【B1】______into earth and destroy life as we know it, say some scientists.
Asteroids are bigger【B2】______of the meteoroids that race across the night sky. Most orbit the sun far from earth and don’t【B3】______us. But there are also【B4】______whose orbits put them on a【B5】______course with earth.
Buy $50 million worth of new【B6】______right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we【B7】______a fatal one, the scientists say, we’ll have a way to change its course.
Some scientists favor pushing asteroids off course with nuclear【B8】______But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are:【B9】______. Experts think an asteroid big enough to destroy lots of life might strike earth once every 500,000 years.【B10】______. "If we don’t take care of these big asteroids, they’ll take care of us," says one scientist. "It’s that simple."
The cure, though, might be worse than the disease.【B11】______? "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them," said a New York Times article.
【B9】
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might (26) crash into earth and destroy life as we know it, say some scientists.
Asteroids are bigger (27) versions of the meteoroids that race across the night sky. Most orbit the sun far from earth and don’t (28) threaten us. But there are also (29) thousands whose orbits put them on a (30) collision course with earth.
Buy $50 million worth of new (31) telescopes fight now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we (32) spot a fatal one, the scientists say, we’ll have a way to change its course.
Some scientists favor pushing asteroids off course with nuclear (33) weapons. But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are: (34) How likely the event is; and how bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike earth once every 500,000 years. (35) Sounds pretty rare--but if one did fail, it would be the end of the world. "If we don’t take care of these big asteroids, they’ll take care of us," says one scientist. "It’s that simple."
The cure, though, might be worse than the disease. (36) Do we really want fleets of nuclear weapons sitting around on earth? "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them," said a New York Times article.
选项
答案
How likely the event is; and how bad the consequences if the event occurs
解析
转载请注明原文地址:https://kaotiyun.com/show/qVt7777K
0
大学英语四级
相关试题推荐
A、InThailand.B、InEurope.C、InBulgaria.D、InIndia.DInwhichcountryisitimpoliteforpeopletousethelefthandforpass
A、ItisaslongasthecivilizationofIndia.B、Itisaslongasthatofanywesterncountry.C、Itisalifeshorterthantheci
A、SportsintheUnitedStates.B、ThemostpopularsportsintheUnitedSports.C、ThreepopularsportsintheUnitedStates.D、Sp
Patriotismmakesonereadyto______(为国捐躯).Itinspirespeopletoworkinjointeffortstodefendthecountry.
RobertEllisSmithbelievesidentitytheftisdifficulttodetectandonecanhardlydoanythingtopreventit.Identitytheft
Thebiggestoilspillhappenedin1989.Theauthorsuggestsmakingsevereregulationstopreventoiltankersfromdumpingoili
Thebiggestoilspillhappenedin1989.Fromtheauthor’spointofview,thebestwaytopreventoilspillsistogetridofoi
Thispassagemainlydiscusseshowepidemicsspreadandhowtopreventinadvance.Incomparisonwithmoneyspentondiseasepre
随机试题
用花卉布置花坛,花镜、花带时,一般要用:做镶边或陪衬来提高花坛,花镜的观赏效果。
患者,女,32岁。带下量多,黄绿如脓,或赤白相兼,质黏腻,臭秽难闻;小腹疼痛,腰骶酸痛,烦热头晕,口苦咽干,小便短赤,大便于结;舌红,苔黄或黄腻,脉滑数。治疗首选
根据我同现行宪法规定,担任下列哪一职务的人员,应由国家主席根据全国人大和金围人大常委会的决定予以任免?()
以下关于职业技能的说法,正确的是()。
某市公安局派出所接到周某报警,称其邻居郭某在家养了一条大狗,她每次路过他家,大狗都会对她吼叫,而且夜间熟睡时常常被狗叫声吵醒。不仅如此,郭某放狗出门遛弯时,小区内其他居民也时常被大狗吓到,觉得没有安全感。此外,郭某的狗随地大小便,影响了小区的环境。周某多次
A、 B、 C、 D、 A根据黑鱼的方向,可直接排除C、D。如果从白鱼的方向来看,就很难找出正确答案,但不难发现,对角线三个图中白鱼的方向是一致的,其次,第一列和第三列图形是一样的。故选A。
湿地的生命力是可以被一点一滴看见的。我最先看见的是湿地上的青蛙。它________地弹跳,让寂静的湿地有了动感;青蛙落脚的地方,黑颈鹤________,动作像骄傲的体操运动员那样自由、舒展;接下来,三三两两的羊像无声的云从村子里飘过来,它们身后是牦牛家族。
Youmusthavebeentroubledbywhentosay"Iloveyou"becauseitisoneofthegreatestpuzzlesinourlife.Whatifyous
Whatdoesthemanproposetodofirst?
A、Threetimes.B、Fourtimes.C、Sixtimes.D、Seventimes.C
最新回复
(
0
)