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
考研
The U. S. space agency, NASA, is planning to launch a satellite that scientists hope will answer fundamental questions about the
The U. S. space agency, NASA, is planning to launch a satellite that scientists hope will answer fundamental questions about the
admin
2016-11-11
39
问题
The U. S. space agency, NASA, is planning to launch a satellite that scientists hope will answer fundamental questions about the origin and destiny of our universe.【C1】______.
The prevailing theory of the universe’s origin, the "Big Bang" theory, says all matter and energy were once compressed into a tiny point. The density and resulting temperature were so enormous that, about 13-to-15-billion years ago by current estimates, a mighty explosion flung the matter hurtling outward in all directions.
【C2】______. They also ask, is the expansion accelerating? Will the universe collapse? What is its shape? Scientists will seek explanations with NASA’s new Microwave Anisotropy Probe, abbreviated as MAP.【C3】______. "MAP will take the ultimate baby picture, an image of the infant universe taken in the fossil light that is still present from the Big Bang," he says. "This glow, this radiation, is the oldest light in the universe. Imprinted on this background, physicists knew, would be the secrets of the Big Bang itself. "
This background radiation is the light and heat that the early cosmic soup of matter emitted. Once roiling hot, it has cooled over the eons to just a few degrees above absolute zero. It was once thought to be distributed evenly. But in 1992, a highly sensitive NASA satellite named COBE detected nearly imperceptible variations in temperature as tiny as 30-millionths of a degree.
【C4】______. "These patterns result from tiny concentrations that were in the very early universe that were the seeds that grew to become the stars and the galaxies that we see today," he says. "The tiny patterns in the light hold the keys for understanding the history, the content, the shape, and the ultimate fate of our universe. "
【C5】______. Princeton University scientist David Spergel says MAP will give us a much more accurate matter count than we have now. " Right now, we want to measure something like the matter-density of the universe," he says. "Today, we can estimate that to a factor of two. That’s pretty good. What we want to do is be able to measure it to about the three-percent level, which is what MAP will be capable of doing. "
To do its job, the $ 145 million MAP spacecraft will settle into an orbit 1. 5 million kilometers from the Earth. This is where the Earth’s and Sun’s gravitational pull are equal, and well past the range of the Earth’ s own obscuring microwave radiation. While the older COBE satellite measured just a small part of the sky, Chalrles Bennett says MAP will scan the entire sky at 1,000 times better resolution. "The patterns that MAP measures are extremely difficult to measure," he says, "MAP will be measuring millionths of a degree temperature accuracies, and that’s hard to do. That’s like measuring the difference between two cups of sand to the accuracy of a single grain of sand. "
[A]Scientists are trying to learn how it clumped together to produce stars, clusters of stars called galaxies, and clusters of galaxies.
[B]Astronomers are reporting evidence that points to a massive star-eating black hole at the center of our Milky Way galaxy.
[C]One of those keys is the amount of matter and its density. More matter with a higher density means more mole gravitational pull, suggesting a slowing of the universe’s expansion, and perhaps even its collapse.
[D]The head of NASA’s Evolution of the Universe program, Alan Bunner, says MAP will measure what is thought a remnant of the Big Bang—an afterglow of microwaves, bathing the universe that was emitted by the ancient cosmic matter.
[E]The principal NASA scientist for the New MAP spacecraft, Charles Bennett, says the heat patterns represent slight differences in the density of the young universe, where denser regions evolved into the present web of structures.
[F]NASA says the first results from the MAP mission will be ready in about 18 months after launch.
[G]The spacecraft will orbit the Earth seeking answers from an extremely faint glow of microwaves that have existed since the beginning of time.
【C4】
选项
答案
E
解析
本题又出现了引号中的话,因此该句也一定提到了某人,而只有E项符合该题;除此之外,E项中的“……在那里,较密集的区域构成现在的网状结构”正好和下一句“These patterns result from…”相吻合。
转载请注明原文地址:https://kaotiyun.com/show/XHoZ777K
0
考研英语一
相关试题推荐
Aspeopleinrichcountriesknowverywell,eatingtoomuchfoodandburningtoofewcaloriesiswhyasubstantialnumberofus
Aspeopleinrichcountriesknowverywell,eatingtoomuchfoodandburningtoofewcaloriesiswhyasubstantialnumberofus
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
Itwasjustafootnotecomparedwiththemoreinfectiousdisasterthatkilledmillionsmorepeoplein1918,butthe1957influen
It’seasytoscarepeopleaboutwhat’sintheirfood,butthedangerisalmostneverreal.Andthe【C1】______itselfkills.Ta
It’seasytoscarepeopleaboutwhat’sintheirfood,butthedangerisalmostneverreal.Andthe【C1】______itselfkills.Ta
TVissooftenaparent’sgoodMend,keepingkidshappilyoccupiedsothegrownupscancookdinner,answerthephone,ortakea
ThestatusofEnglishasaninternationallanguageappearsunassailable.Itissimultaneouslypreeminentinscience,politics,b
ThestatusofEnglishasaninternationallanguageappearsunassailable.Itissimultaneouslypreeminentinscience,politics,b
随机试题
A.连理汤B.桃花汤合真人养脏汤C.黄连阿胶汤合驻车丸D.乌梅丸虚寒痢,治宜当选
关于辨证的描述正确的是
下列哪一项外治精浊法是错误的
1999年5月,甲日用化妆品厂就其生产的化妆品注册了“NOBEL”商标,该商标与法国一著名的化妆品品牌相同。2004年7月,该法国化妆品公司乙公司进入中国,欲申请注册“NOBEL”商标,就该商标专用权的归属问题与甲化妆品厂产生了争议。关于甲、乙间争议的说法
关于基金财产保管机构,下列说法正确的是()。
MachinesandforeigncompetitionwillreplacemillionsofAmericanjobs.Butworkwillbeplentifulforpeopletrainedintheoc
下列关于数据备份方法的描述中,错误的是
下列域名中,表示教育机构的是
A、Youhavetobuyit.B、Thisafternoon,Ithink.C、Onthethirdfloorofthelibrary.D、It’s10:30.C问题是“打扰了,哪里有英语杂志”是对地点的提问,而B
Thefactoryhasdevelopedanewwayofdealingwith(industry)________waste.
最新回复
(
0
)