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
2017-10-23
24
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/jgIZ777K
0
考研英语一
相关试题推荐
[A]LearnHowtoRecognizeYourSoulMate[B]TakeReligionSeriously[C]ConsiderMarryingYoung[D]LearntoReadRegularly[E
Inthefollowingtext,somesentenceshavebeenremoved.ForQuestions1-5,choosethemostsuitableonefromthelistA-Gtofi
Intheearly20thcentury,ahorsenamedCleverHanswasbelievedcapableofcountingandotherimpressivementaltasks.Aftery
Intheearly20thcentury,ahorsenamedCleverHanswasbelievedcapableofcountingandotherimpressivementaltasks.Aftery
Inapurelybiologicalsense,fearbeginswiththebody’ssystemforreactingtothingsthatcanharmus—theso-calledfight-or
ManyAmericansregardthejurysystemasaconcreteexpressionofcrucialdemocraticvalues,includingtheprinciplesthatallc
France,whichpridesitselfastheglobalinnovatoroffashion,hasdecideditsfashionindustryhaslostanabsoluterighttod
Thegovernmentistobanpaymentstowitnessesbynewspapersseekingtobuyuppeopleinvolvedinprominentcases【C1】______thet
TheU.S.systemofhighereducationiswidelyconsideredtheworld’sbest.Acollegeeducation【C1】______substantialbenefits—abo
TheU.S.systemofhighereducationiswidelyconsideredtheworld’sbest.Acollegeeducation【C1】______substantialbenefits—abo
随机试题
男,28岁,空腹突发上腹部剧痛3小时,后转移至右下腹,无反跳痛,压痛(+),既往10年泛酸暖气病史,自服药物缓解,肠鸣音消失,腹肌轻度紧张,肝浊音界消失,诊断为最可能的诊断是
某市房地产主管部门领导王大伟退休后,与其友张三、李四共同出资设立一家房地产中介公司。王大伟不想让自己的名字出现在公司股东名册上,在未告知其弟王小伟的情况下,直接持王小伟的身份证等证件,将王小伟登记为公司股东。下列哪一表述是正确的?
某盐场2009年7月份发生的业务如下:(1)生产液体盐30万吨;(2)外购液体盐2万吨用于加工固体盐;(3)以自产液体盐20万吨用于生产固体盐15万吨,以当月外购液体盐2万吨加工固体盐1.5万吨,当月生产的固体盐全部对外销售,共取得销售收入900万元,自产
股票分割的主要作用有()。
参展上海世博会的我国各省市馆基本反映了当地的自然与人文特色。有展示鼓楼、苗寨、银饰等民族元素的;有展示蒙古包、祥云、马鞍等文化元素的;有以冰雪为主线布局展馆的。这些展馆所属省区依次是()。
中国特色社会主义的四个特色是()。
A、 B、 C、 D、 C前两项消除大圆内外相同元素,保留大圆内外相异元素后,将所得图形逆时针旋转180°得到图形三。则可推出单圆(内)外相同元素相消,保留半圆(内)外相异元素后所得图形逆时针旋转180°,得
TheelectionwillbebroughtforwardtoJuneassomanypeopleareonholidayinJuly.
白盒测试法又称为(4),黑盒测试法又称为(5)。
Whatdoesthewomandoforaliving?
最新回复
(
0
)