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
69
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.
【C5】
选项
答案
C
解析
该题的上一段最后一句是“极微小的光波样式,蕴含了解我们宇宙的历史、构成成分、形状以及最终命运的钥匙”。下一句的其中的一把钥匙就是…符合承上的作用,因此选C项“其中一把钥匙就是物质的数量和密度。较多的物质加上较高的密度,表明有较大的引力,从而减缓宇宙的扩散甚至最终的崩溃”。
转载请注明原文地址:https://kaotiyun.com/show/HHoZ777K
0
考研英语一
相关试题推荐
"What’sthedifferencebetweenGodandLarryEllison?"asksanoldsoftwareindustryjoke.Answer:Goddoesn’tthinkhe’sLarry
Whatisawomanworth?Thatisthequestionthathastobefacedbydivorcingcouplesandbytheirlawyers.Theanswersseemto
OntheheelsofElNino,itsopposite,LaNinamaysoonarrive.InaWeeklyUpdate,scientistsattheNOAAClimatePredictionCe
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
ArecentcaseinAustraliashowshoweasilyfearcanfrustrateaninformant’sgoodintentions.InDecember,awomanwroteanonym
Itwasjustafootnotecomparedwiththemoreinfectiousdisasterthatkilledmillionsmorepeoplein1918,butthe1957influen
It’seasytoscarepeopleaboutwhat’sintheirfood,butthedangerisalmostneverreal.Andthe【C1】______itselfkills.Ta
Science,beingahumanactivity,isnotimmunetofashion.【F1】Forexample,oneofthefirstmathematicianstostudythesubject
随机试题
甲公司2×11年度至2×16年度发生的与一栋办公楼有关的业务资料如下:(1)2×11年1月1日,甲公司与乙公司签订合同,委托乙公司为其建造一栋办公楼。合同约定,该办公楼的总造价为5000万元,建造期为12个月,甲公司于2×11年1月1日向乙公司预
整体墙是指__或洞口很小的剪力墙。
建筑工程第三者责任险包括在()中。
2017年2月,某市税务机关拟对辖区内某房地产开发公司的房产开发项目进行土地增值税清算。该房地产开发公司提供该房产开发项目资料如下:(1)2014年3月以12000万元拍得用于该房地产开发项目的一宗土地,并缴纳契税。(2)2014年5
下列属于根据赫茨伯格双因素理论中的激励因素的有()。
某实验室模拟酸雨,现有浓度为30%和10%的两种盐酸溶液,实验需要将二者混合配置出浓度为16%的盐酸700克备用。那么30%的盐酸需要多少克?
材料一:“甲盗,赃值千钱,乙知其盗,受分,赃不盈一钱。问乙何论?同论。”——《法律答问》材料二:“甲盗钱以买丝,寄乙,乙受,弗知盗,乙论何也
1.将文件夹下ABNQ文件夹中的XUESHI.C文件复制到文件夹中,文件名为USER.FFF。2.将文件夹下LIANG文件夹中的TDENGE文件夹删除。3.为文件夹下GAQU文件夹中的XIAO.BB文件建立名为KUAMS的快捷方式,并存放在文件夹下。
HistorianE.HCarr’sthesisthatalldebatesconcerningtheexplanationofhistoricalphenomenarevolvearound“thequestionof
Thecrewworkedsohardthattheyfinishedtheentireprojectthreedays______ofschedule.
最新回复
(
0
)