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
专升本
Unless we spend money spotting and preventing asteroids now, one might crash into Earth and destroy life as we know, say some sc
Unless we spend money spotting and preventing asteroids now, one might crash into Earth and destroy life as we know, say some sc
admin
2011-03-26
58
问题
Unless we spend money spotting and preventing asteroids now, one might crash into Earth and destroy life as we know, say some scientists.
Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.
Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion 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 asteroids 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. "Its that simple."
The cure, though, might be worse than the disease, Do we really want fleets of nuclear weapons silting around on Earth? "The world has less to fear from doomsday 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 similar in nature.
B、There are more asteroids than meteoroids.
C、They are heavenly bodies different in composition.
D、Asteroids are more mysterious than meteoroids.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/LYvC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Thefirstsailorpretendedtobeillbecausehewantedto______.Thepatientsfeltbetterquicklybecause______.
TheBritishgovernmentoftensaysthatfurnishingchildrenwith______totheinformationsuperhighwayisatoppriority.
WhichofthefollowingstatementsisTRUE,accordingtotheauthor?ThenewFordcarsarecitedasanexampletoshowthat____
BecauseMaxhadlungcancer,hestopped______.
Thisoldpicture(remindedherofthosedaysspentinthecountryside).
Abeamoflightwillnotbendroundthecornersunless______todosowiththehelpofareflectingdevice.
Asaresultofdestroyingtheforests,alarge_____ofdesert______coveredtheland.
Thechildtookaspoonfulandtasteditcarefully______itwashot.
Everythinghasaname.Allpeople,places,andthingshavenames.Forexample,JennyisthenameofastudentfromEngland.Engl
EveryyeargraywhalesmigratefromtheBeringSeainAlaskatotheBajaPeninsulainMexico.Elevengraywhaleshavediedi
随机试题
自然界有许多植物的叶子会动,比如含羞草、合欢等豆科植物白天张开叶子,晚上会合上叶子“睡眠”;捕蝇草的叶子能闭合起来,捕食苍蝇等昆虫。像含羞草、合欢等植物的这种“睡眠运动”自古以来就受到人们关注,可是植物为什么会睡眠,却一直是个【1】。18世纪,法
《中华人民共和国劳动法》规定国家通过()和社会发展,创造就业条件,扩大就业机会。
当患者失血过多时可采用贫血合并急性呼吸窘迫综合征时,可采用
A.去枕平卧位B.平卧位C.仰卧中凹位D.半卧位E.高斜坡卧位休克病人应采取
兔出血症病毒属于
某企业在五年前就准备购建一条生产线,并已经做了前期调查和可行性分析,支付相关费用10万元。但由于资金没有落实,该项目被搁置下来。现在已经筹集到该项目所需要的资金,企业重提旧事。该生产线购置费1500万元,预计可使用10年,预计每年将发生维护修理费用10
债务融资的资金融出方所获得的报酬有()。
在古代社会中,对国王的称呼有很多。下列选项中,把国王尊称为“法老”的是()。
一、注意事项1.申论考试与传统的作文考试不同,是分析驾驭材料的能力与表达能力并重的考试。2.作答参考时限:阅读资料40分钟,作答110分钟。3.仔细阅读给定的资料,按照后面提出的“申论要求”依次作答在答题纸指定位置。
在软件测试中,检查各模块间接口关系、各模块组合在一起时的功能是否满足总的功能要求的测试是( )
最新回复
(
0
)