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 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
2011-02-28
28
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 $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 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.
What does the passage say about asteroids and meteoroids?
选项
A、They are heavenly bodies different in composition.
B、They are heavenly bodies similar in nature.
C、There are more asteroids than meteoroids.
D、steroids are more mysterious than meteoroids.
答案
B
解析
本题属细节性问题。与此问题有关的句子是: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.读完这个句子后,我们对比四个选项,看哪个选项和这句活的内容相符合。首先可排除C选项There are more asteroids than meteoroids和D选项Asteroids a
转载请注明原文地址:https://kaotiyun.com/show/Ictd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Whatisthespeakermainlydiscussing?
TheUnitedNations,notoriousforendlessdeliberations,istryingatechnologicalquickfix.ItsGlobalCompactOffice,whichp
TheUnitedNations,notoriousforendlessdeliberations,istryingatechnologicalquickfix.ItsGlobalCompactOffice,whichp
Howlongdoesaninterviewusuallylastaccordingtothespeaker?
Howlongdoesaninterviewusuallylastaccordingtothespeaker?
TheUnitedStatesleadsallindustrialnationsintheproportionofitsyoungmenandwomenwhoreceivehighereducation.Whyis
WhatdoesthespeakersayabouttheroadbetweenMaineandQuebec?
WhatdidtheprofessorwanttotalktoAnnabout?
Whydidthewomantalktotheprofessor?
随机试题
一日,该患儿出现呕吐,面色苍白,四肢末梢凉,血压60/50mmHg,可能发生了哪种并发症一日,该患儿突然感到腹部疼痛,面色苍白,可能发生的并发症是
以下关于公民的民事权利能力的表述正确的是()。
速动资产指变现能力较强的流动资产,如现金、有价证券和应收账款,其计算方法有()。
我国的基本单位按其作用和性质的不同划分为()。
棉花期货的多空双方进行期转现交易,多头开仓价格为10210元/吨,空头开仓价格为10630元/吨,双方协议以10450元/吨平仓,以10400元/吨进行现货交收,空头可节省交割成本200元/吨,进行期转现后,多空双方实际买卖价格为()。
金融犯罪的特殊主体包括()。
Thisplaceisreallywellworth______asecondtime.
A、 B、 C、 D、 A各行第一个图形中两元素图形移动依次得到第二个、第三个图形。
精益生产是通过系统结构、人员组织、运行方式和市场供求等方面的变革,最大限度地消除浪费和降低库存以及缩短生产周期,力求实现低成本准时生产的技术。其最终目的是通过流程整体优化、均衡物流、高效利用资源、消灭一切库存和浪费,达到用最少的投入向顾客提供最完美价值的目
[*]
最新回复
(
0
)