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(小行星)now, one might crash into Earth and destroy life as we know it, say some
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
admin
2012-07-18
25
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’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 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’11 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 a-round 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.
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:https://kaotiyun.com/show/cinO777K
0
考博英语
相关试题推荐
Althoughoftenextremelycriticalofthemedicalprofessionasawhole,peoplearerarelywillingtotreattheirpersonaldoctor
IntheUnitedStatesandinmany【51】countriesaroundtheworld,therearefourmainwaysforpeopletobeinformed【52】develo
AttheKyotoconferenceonglobalwarminginDecember1997,itbecameabundantlyclearhowcomplexithasbecometoworkoutint
AttheKyotoconferenceonglobalwarminginDecember1997,itbecameabundantlyclearhowcomplexithasbecometoworkoutint
Thecomingofautomationis______tohaveimportantsocialconsequences.
Disabledpeoplearenowabletocareformanyoftheirownneeds,______educationalgoals,andmaintainjobs.
Itisoneoftheworld’smostrecognizedphrased,oneyoumightevenhearinplaceswherelittleEnglishisspoken:"Thename’s
Distanceeducationisenrollmentandstudywithaneducationalinstitutionthatprovideslessonmaterialspreparedinasequenti
Ateacherissomeonewhocommunicatesinformationorskillsothatsomeoneelsemaylearn.Parentsarethe【41】teachers.Justby
随机试题
呈白色或淡黄色的粉末,体轻,质松软而细腻光滑的饮片是
被誉为“美学之父”的美学家是()
简述企业管理计划职能的主要内容和程序。
此病例植皮时最好采用游离植皮术后,皮片最初数小时的营养供应主要是靠
当出现以下()情况时,应通过荷载试验评定桥梁的承载能力。
沉井类型中关于多孔沉井的表述正确的是():
同业拆借业务中,拆入银行拆人资金时应借记的科目是()。
A、 B、 C、 D、 A
What______acrimedependsonwhatthecountry’slawallows.
Giveupsmoking.Your(healthy)______willimprovesoon.
最新回复
(
0
)