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
43
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.
【C1】
选项
答案
G
解析
文章第一段提到:美国宇航局计划发射一颗卫星来找到关于我们宇宙的起源和未来命运的答案。接下来要谈到的应是利用卫星如何找到答案或者为什么发射卫星能够找到答案。G项“太空器将沿轨道飞行,从宇宙初始就存在的微弱微波中寻找答案”符合本题题意。
转载请注明原文地址:https://kaotiyun.com/show/JHoZ777K
0
考研英语一
相关试题推荐
Fordecades,ferryboatscrossedthecoldwatersofMichigan’sStraitsofMackinac,shuttlingpeopleandvehiclesbetweenthetw
Theclean-energybusinessisturningintothenextbiginvestmentboom,inwhichrisksarelightlyignored.Untilrecently,reca
Theclean-energybusinessisturningintothenextbiginvestmentboom,inwhichrisksarelightlyignored.Untilrecently,reca
Theclean-energybusinessisturningintothenextbiginvestmentboom,inwhichrisksarelightlyignored.Untilrecently,reca
OntheheelsofElNino,itsopposite,LaNinamaysoonarrive.InaWeeklyUpdate,scientistsattheNOAAClimatePredictionCe
InthefirstyearorsoofWebbusiness,mostoftheactionhasrevolvedaroundeffortstotaptheconsumermarket.Morerecentl
It’seasytoscarepeopleaboutwhat’sintheirfood,butthedangerisalmostneverreal.Andthe【C1】______itselfkills.Ta
The20thcenturywitnessedtwoprofoundchangesinregionsoftheworldwherepeoplearewelleducatedandscienceandtechnolog
Manywilldoubttobaccoindustryclaimsthatitissharpeningitssciencetoevaluate"healthiercigarettes".Butthat’swhatwi
随机试题
教育理论研究的特点有概括性与间接性、_________、层次性、继承性与超前性。
临床对颅内压增高的诊断主要依靠
A、钩端螺旋体病B、肾综合征出血热C、狂犬病D、伤寒E、流行性乙型脑炎病人自觉周身不适,咽喉有紧缩感。2个月前被狗咬伤小腿
下列哪种药物能使双香豆素类抗凝血作用减弱()
施工图预算的编制依据有( )。
能够影响管理幅度大小的因素主要有()。
下列常见的心理现象与成语对应错误的是:
贪污罪的犯罪对象包括()
2011年9月17日,在“占领华尔街”这一口号的号召下,纽约爆发抗议活动。示威者在号称全球经济心脏的华尔街附近祖科蒂公园扎营,在纽约证券交易所等华尔街金融机构外举标语、喊口号,抗议华尔街“贪婪”无止境,指责政府救助少数金融机构而使多数人陷入经济困境。许多示
Agoodtitleforthisreadingselectionis________.WhatWasthefirstthingWhichWasdonebyHenrybeforeheWenttoWork?
最新回复
(
0
)