首页
登录
职称英语
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one m
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one m
游客
2023-07-30
76
管理
问题
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might【B1】______into earth and destroy life as we know it, say some scientists.
Asteroids are bigger【B2】______of the meteoroids that race across the night sky. Most orbit the sun far from earth and don’t【B3】______us. But there are also【B4】______whose orbits put them on a【B5】______course with earth.
Buy $50 million worth of new【B6】______right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we【B7】______a fatal one, the scientists say, we’ll have a way to change its course.
Some scientists favor pushing asteroids off course with nuclear【B8】______But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are:【B9】______. Experts think an asteroid big enough to destroy lots of life might strike earth once every 500,000 years.【B10】______. "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.【B11】______? "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them," said a New York Times article. [br] 【B8】
Unless we spend money to spot and prevent asteroids, i.e. minor planets, one might (26) crash into earth and destroy life as we know it, say some scientists.
Asteroids are bigger (27) versions of the meteoroids that race across the night sky. Most orbit the sun far from earth and don’t (28) threaten us. But there are also (29) thousands whose orbits put them on a (30) collision course with earth.
Buy $50 million worth of new (31) telescopes fight now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we (32) 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 (33) weapons. But the cost wouldn’t be cheap.
Is it worth it? Two things experts consider when judging any risk are: (34) How likely the event is; and 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. (35) Sounds pretty rare--but if one did fail, 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. (36) Do we really want fleets of nuclear weapons sitting 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.
选项
答案
weapons
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2883298.html
相关试题推荐
【B1】[br]【B3】A、AlthoughB、UnlessC、IfD、UntilA词义辨析题。两个分句的谓语分别是agree和disagree,由
【B1】[br]【B13】A、unlessB、exceptC、untilD、ifC本句意思为:人们会晚些时候眨眼,直到他们要记住六位数而不是两位数。
【B1】[br]【B18】A、directB、interpretC、followD、preventB动词辨义题[考频:50]。比较四个选项,只有选B
【B1】[br]【B10】A、unlessB、ifC、althoughD、sinceA逻辑衔接题。要做对此题需判断出前后两个句子的关系。根据上下文可
Wewon’ttelliftheoperationwassuccessful__________(除非他完全清醒).unlessheis
Unlesswespendmoneytospotandpreventasteroids,i.e.minorplanets,onem
Unlesswespendmoneytospotandpreventasteroids,i.e.minorplanets,onem
Unlesswespendmoneytospotandpreventasteroids,i.e.minorplanets,onem
Unlesswespendmoneytospotandpreventasteroids,i.e.minorplanets,onem
[originaltext]UnlessyouhavevisitedthesouthernUnitedStates,youproba
随机试题
Duringthefallmonthsathighschoolguidancecounselingprograms,juniors
TheStockMarketWhenanewcompanyisorganized
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
ScoresofuniversityhallsofresidencesandlecturetheatresintheUKwere
A.2000ml B.2100ml C.1000ml D.300ml E
某道路改造工程行车道为混凝土路面,现将原来道路两侧的人行道、侧石拆除后重建,新建
对于居住物业,除了物业管理外,还要进行设施管理、资产管理等物业资产管理。()
岩土工程勘察中采用75mm单层岩芯管和金刚石钻头对岩层钻进,其中某一回次进尺1.
男童,3岁。右颈上部无痛性肿块半年。体检见右颈上部胸锁乳突肌前及表面有一肿块,3
糖、脂质和氨基酸彻底氧化的共同途径是( )。A.葡萄糖-丙氨酸循环 B.柠檬
最新回复
(
0
)