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
2011-01-21
48
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 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 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
转载请注明原文地址:https://kaotiyun.com/show/8F3d777K
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
apersonalvisit他们滋扰她多日,使邻居进出都困难,而一个也是记者身份的朋友试图与她交谈,只是以朋友的身份,所以答案必须是apersonalvisit。如果少了personal答案就没有意义了。
Humansliketoregardthemselvesasexceptional.Manyphilosophersbelievehumansaretheonly【C1】______whichunderstandsthato
Thatlowmoaningsoundinthebackgroundjustmightbethefoundingfathersprotestingfrombeyondthegrave.Theyhavebeendoi
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
61)Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmot
61)Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmot
WhatdoesProfessorMorgando?
WhydoesthewomanfeelgratefultoProfessorMercheno?
Apersonmayhaveanideaabouthimselfthatwillpreventhimfromdoinggoodwork.Hemayhavetheideathatheisnotcapable
随机试题
国际服务营销的特征。
急性炎症早期的化脓性炎灶中,主要的炎性细胞是()。
风湿热的诊断标准不包括
孕妇,24岁。8小时前自然分娩一正常足月女婴,对婴儿提供护理措施。下列说法不正确的是
业主方在进度控制方面的主要工作任务不包括( )。
在建设工程项目中,监理单位与施工单位之间的关系是()关系。【2006年考试真题】
某建设工程施工合同约定,合同工期为18个月,合同价款为2000万元。建议单位在申请领取施工许可证时,应当到位的建设资金原则上不得少于()万元。
某多层商品住宅的营销方案、销售价格表是以顶层为基准层制订的,顶层价格最高。向下依次降低,并且对一次性付款和分期付款(分三次)的时间做出了具体安排。现欲对价格进行调整。下列价格调整措施中,属于提高销售价格的有()。
电影《风云儿女》的主题歌《义勇军进行曲》创作于()年。
=_______.
最新回复
(
0
)