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
外语
A、Why stars are moving farther apart. B、Why stars attract each other. C、Why stars don’t fall in towards each other. D、Why stars
A、Why stars are moving farther apart. B、Why stars attract each other. C、Why stars don’t fall in towards each other. D、Why stars
admin
2014-05-30
23
问题
Today most astronomers accept the notion that groups of stars that make up the universe are all moving farther and farther away from each other, but until very recently this idea of an expanding universe was not a theory most European scholars believed in since ancient times. And up to about the 17th century most of these scholars thought the size of the universe has remained unchanged since the moment of its creation or perhaps forever, with all the stars remaining more or less in place in relation to each other, but that was challenged in the late 17th century by Issac Newton’s idea of gravity as a force of attraction, which contradicted the idea of a universe that is static, unchanging. If gravity causes all the stars out there in space to attract each other as Newton said, then they couldn’t remain motionless. Sooner or later all the stars will fall in towards each other. Well, scientists then propose a new model. Taking Newton’s theory into account, they didn’t want to abandon the idea of motionless status, but for this model to work, they had to modify Newton’s law of gravity, so they theorized that for distance as large as those between stars, the gravitation force repels rather than attracts. As you might guess, there are other contradictions. But this is pretty resolved by the currently accepted theory, which says the universe is continuously expanding. You’ll be reading all about that as your homework tonight.
16. What does the speaker say about most astronomers today?
17. What did most European scholars believe about the size of the universe before 17th century?
18. What did some scientists try to explain by suggesting that stars repel each other?
选项
A、Why stars are moving farther apart.
B、Why stars attract each other.
C、Why stars don’t fall in towards each other.
D、Why stars remain motionless.
答案
C
解析
短文提到,根据牛顿的万有引力法则,星球迟早会与其他星球聚集。一些科学家提出了一个新的模式,他们不愿摒弃宇宙不运动的想法,因而不得不修改牛顿的万有引力法则。他们认为星球之间相互排斥而不是吸引。这么一来,他们需要对这一理论进行解释了。C为答案。
转载请注明原文地址:https://kaotiyun.com/show/xM17777K
0
大学英语六级
相关试题推荐
TheemploymentdiscriminationlawsuitagainstWal-Mart,whichtheSupremeCourtheardlastweek,isthelargestinAmericanhist
A、Hemightvisitthewomaninthehospital.B、Hewillrefusetoacceptthewoman’spaper.C、Hemaydenythewoman’srequesttoh
InherinternationalbestsellingTalktotheHand,authorLynneTrussarguesthatcommoncourtesiessuchassaying"Excuseme"a
DrugshavebeenapartoftheAmericanstorysincetheveryfirstdayColumbuslandedintheNewWorld.TheTainoIndians【B1】___
A、Theyareoftenexploitedbythepublic.B、Theyareoftenconsideredlazyanddishonest.C、Theyareoftenofferedjobswithhig
A、Peaceful.B、Regretful.C、Ordinary.D、Satisfactory.D说话者在短文最后表达了自己对50年来生活的看法:mostofmyfirstfiftyyearshavebeengoldenones
Inthemidstofaperiodofrapidlanguageextinction,withalanguageestimatedtodieeverytwoweeks,linguistshavefounda
Allourdreamshavesomethingtodowithourfeelings,fears,longings,wishes,needsandmemories.Ifapersonishungry,orti
In2011,manyshopperschosetoavoidthefranticcrowdsanddotheirholidayshoppingfromthecomfortoftheircomputer.Sales
随机试题
在《盛京刑部原档》中记载,清政权关外已经有了犯罪的初步分类,其规定应当判处死刑并不能援用赦免的罪是()。
EAI集成的深度上不包括
用避污纸垫着拿取物品或操作,保持________或用物________,以省略________。
病因于寒,素体阳虚,痰从寒化,属寒痰为患,则发为反复发作,正气耗伤或素体肺肾不足者,可表现为
依据《烟花爆竹安全管理条例》的规定,受理道路运输烟花爆竹申请的公安部门应当自受理之日起()日内对托运人提交的有关材料进行审查,对符合条件的,核发“烟花爆竹道路运输许可证”。
某施工单位在混凝土搅拌场处私设排污口,将生产过程中产生的废水直接排入水沟,经水沟进人稻田,形成了板结,使村里几十亩水稻受损严重。市环保局责令该施工单位限期改正,限期拆除私自设置的排污口,并对该施工单位处以()的罚款。
为了防范证券结算风险,我国设立了证券结算风险基金。下列各项所造成的登记结算机构的损失中可以用证券结算风险基金垫付或弥补,包括()。Ⅰ.违约交收Ⅱ.技术故障Ⅲ.操作失误Ⅳ.不可抗力
私募基金的合格投资者投资于单只私募基金的金额不低于()万元。
在软件需求工程中,需求管理贯穿整个过程。需求管理最基本的任务是明确需求,并使项目团队和用户达成共识,即建立______。
D分析句子结构可知,本句的主干是“Theimpressiveaspect...isitspervasivenessinhumanculture.”,句中的that______withit是that引导的定语从句,that指代these
最新回复
(
0
)