首页
登录
职称英语
Unless we spend money to spot and prevent asteroids (小行星)now.one might crash
Unless we spend money to spot and prevent asteroids (小行星)now.one might crash
游客
2025-04-16
36
管理
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 whose orbits put them on a collision course with Earth.
Buy $ 40 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’II 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 if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 400,000 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. [br] We can conclude from the passage that____.
选项
A、while pushing asteroids off course nuclear weapons would destroy the world
B、asteroids racing across the night sky are likely to hit Earth in the near future
C、the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D、workable solutions still have to be found to prevent a collision of asteroids with Earth.
答案
D
解析
根据文章断定:B项内容应予否定。A、C两项均不能充分合理推断出。
转载请注明原文地址:http://tihaiku.com/zcyy/4040825.html
相关试题推荐
Doweneedlawsthatpreventusfromrunningriskswithourlives?Ifso,th
Doweneedlawsthatpreventusfromrunningriskswithourlives?Ifso,th
Doweneedlawsthatpreventusfromrunningriskswithourlives?Ifso,th
Thestudentsinthedormitorieswereforbidden,unlesstheyhadspecialpasses,_
Shewasafraidthatunlessthetrainspeededupshewouldloseher______toScotl
Sheworegloveswhenshewasgardeningtopreventthenettlesfrom______her.A、fl
Unlessyourhandwritingis______,ortheformspecificallyasksfortypewriting,
Wemadeplansforavisit,but______difficultieswithcarpreventedit.A、subordi
Unlesswespendmoneytospotandpreventasteroids(小行星)now.onemightcrash
Unlesswespendmoneytospotandpreventasteroids(小行星)now.onemightcrash
随机试题
Themainideaofthesebusiness-schoolacademicsisappealing.Inawordwt
【T1】人人都需要朋友,若你在交朋友方面总是失败,就该反省自己,看是否你的个性有什么问题。(if)或许你有些在社交上应该避讳的缺点,比如势力、饶舌、说脏
TheCivilWarofEnglandbrokeoutin_____.A、1789B、1879C、1642D、1462C
Ascientistwhowantstopredictthewayinwhichconsumerswillspendtheir
Jobsatisfactionisabusinesstermthatreferstoaperson’scontentmentwi
ThescientistGalileoclaimedthattheearth______aroundthesun.A、movesB、mov
Theconceptofpersonalchoiceinrelationtohealthbehaviorsisanimportan
建筑基地内绿地率的计算,下列哪项正确?()A.绿地率=(绿化覆盖面积/用地面
有位老师上课批评了一位学生,他生气的跑了出去,如果你是这位老师,你会怎么做?
关于养老保障信托,下列说法不正确的是()。A:这种信托是适用于退休规划的有效工具
最新回复
(
0
)