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
考研
Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say so
Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say so
admin
2013-01-05
71
问题
Unless we spend money to spot and prevent asteroids (小行星) now, one might crash into Earth and destroy life as we know it, say some scientists.
Asteroids are bigger versions of the meteoroids (流星) that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth.
Buy $ 50 million worth of new telescopes right now. Then spend $ 10 million a year for the next 25 years to locate most of the space rocks. By the time we 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 weapons. But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are: 1) How likely the event is; and 2) How bad the consequences are if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500, 000 years. Sounds pretty rare—but if one did fall, 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. Do we really want fleets of nuclear weapons sitting around on Earth? "The world has less to fear from doomsday (毁灭 性的) rocks than from a great nuclear fleet set against them," said a New York Times article. (272 words)
What do scientists say about the collision of an asteroid with Earth?
选项
A、It is very unlikely but the danger exists.
B、Such a collision might occur once every 25 years.
C、Collisions of smaller asteroids with Earth occur more often than expected.
D、It’s still too early to say whether such a collision might occur.
答案
A
解析
本题属于推理题。文章的第五段的后三句说道:专家们认为虽然小行星与地球相撞的可能性很小一一每50万年一次,但一旦发生了便是世界末日。有一位科学家说:“如果我们不注意它们(小行星),它们就会注意(袭击)我们,事情就是那么简单。”由此可知,A是正确的。
转载请注明原文地址:https://kaotiyun.com/show/H8na777K
本试题收录于:
艺术硕士(艺术基础)题库专业硕士分类
0
艺术硕士(艺术基础)
专业硕士
相关试题推荐
简要阐述艺术发展中继承与创新的辩证关系。
电视叙事、抒情的艺术手段主要体现为()。
在18世纪,音乐、诗歌、绘画、雕刻和舞蹈被总称为()。
U.SjeansmakerLeviStrauss&Co.denieditwasplayingonconsumerfearsbylaunchingalineoftrousersfittedwith"anti-
U.SjeansmakerLeviStrauss&Co.denieditwasplayingonconsumerfearsbylaunchingalineoftrousersfittedwith"anti-
Whatmightdrivingonanautomatedhighwaybelike?Theanswerdependsonwhatkindofsystemisultimatelyadopted.Twodistinc
Unlesswespendmoneytospotandpreventasteroids(小行星)now,onemightcrashintoEarthanddestroylifeasweknowit,sayso
U.S.jeansmakerLeviStrauss&Co.denieditwasplayingonconsumerfearsbylaunchingalineoftrousersfittedwith"anti-r
U.S.jeansmakerLeviStrauss&Co.denieditwasplayingonconsumerfearsbylaunchingalineoftrousersfittedwith"anti-r
随机试题
患者,男,30岁。饱餐后上腹部持续疼痛1天。查体:下腹部压痛、反跳痛。应首先考虑的是()
A.血清脂肪酶B.血尿素氮C.血清淀粉酶D.血清正铁白蛋白E.血清钙
患者男,44岁。右上腹疼痛半年,加重伴上腹部包块1个月,伴腹胀、纳差、恶心,无呕吐、腹泻,大小便正常,体重下降5kg。既往有乙肝病史多年。查体:T36.7℃,P78次/分,R18次/分,BP110/70mmHg,全身皮肤无黄染,巩膜轻度黄染。腹平软,右
人类的许多性状呈常染色体显性遗传,决定短指症的基因为显性基因A,正常为隐性基因a,两个均为杂合子的短指症患者婚配,生育短指症患者的概率为()。
某班的班干部在看到班上的同学违反纪律时,会将情况报告给老师,这体现出的高级情感是()。
A、 B、 C、 D、 C前四个图形封闭空间的个数分别为2,3,4,5。第五个图形的空间个数应为6,故C选项正确。
中国近代宪政史上公布的第一部正式宪法是()
根据法律规定,合同双方债务法定抵销的条件包括()
系统管理指的是IT的高效运作和管理,它是确保战略得到有效执行的战术性和运作性活动,其核心目标是________。
Forcenturies,immigrantshavecometoAmericaseekingthepromiseoflife,liberty,andthepursuitofhappiness.Somecamefl
最新回复
(
0
)