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
Mounting evidence has led astronomers to just an improbable conclusion; At least 90 percent and possibly 99 percent of all matte
Mounting evidence has led astronomers to just an improbable conclusion; At least 90 percent and possibly 99 percent of all matte
admin
2010-01-10
27
问题
Mounting evidence has led astronomers to just an improbable conclusion; At least 90 percent and possibly 99 percent of all matter in the universe is completely【C1】______ . Astronomers call this stuff dark matter.
An astronomer first reported the matter after noting some unusual behaviour in visible matter. In 1993, Swiss astrophysicist Fritz Zwicky concluded that 【C2】______ was causing strange gravitational effects【C3】______ these galaxies.
Galaxies are like【C4】______ islands in deep space【C5】______ billions of stars that are held together by the force of【C7】______ .Some galaxies are part of【C6】______ systems called clusters; which contain many galaxies. Most galaxies; belong to smaller systems called groups. Groups and clusters in 【C8】______ form even larger【C9】______ known as super-clusters. Just【C10】______ the force of gravity keeps stars together in galaxies the force of gravity【C11】______to keep galaxies together in clusters~
This same force of gravity keeps planets【C12】______ around the sun【C13】______ flying off into space. How great a force gravity exerts depends on the mass of the objects【C14】______ and the distance between them, a【C15】______ discovered by Newton. The amount of mass and the distance between objects also【C16】______ how fast the objects travel as they orbit each other. The force of its gravity keeps Earth and the other planets【C17】______ orbit around it. The orbital speeds of the planets【C18】______ with increasing distance from the sun. The planet nearest to the sun travels at an orbital speed of 48 kilometers per second【C19】______ the distant planet Pluto orbits【C20】______ speed of 7 kilometers per second
【C3】
选项
A、On
B、in
C、to
D、with
答案
A
解析
have effect on sth。
转载请注明原文地址:https://kaotiyun.com/show/Aq6K777K
0
专业英语四级
相关试题推荐
(1)EducationisanimportantthemeinyouthathleticsintheUS.Youngkids,energetic,rambunctious,coopedupinclass,yearn
(1)ScientistssayChandraprovidesfirstevidencethattwomysteriescancoexistinonegalaxy.(2)Inaverybrightgalaxy4
(1)MarkTwain’sinstructionswerequiteclear:hisautobiographywastoremainunpublisheduntil100yearsafterhisdeath.Who
(1)Khalida’sfathersaysshe’s9—ormaybe10.AsmuchasSayedShahloveshis10children,thefunctionallyilliterateAfghanfa
(1)WhenoutsourcingcompanyKeaneInc.hiredJyotiTaneja10monthsagotoworkinitsGurgaon,India,offices,herparentswere
(1)WhenWinstonChentoldhisfriendsthathehadquithisjobaschieftechnologyofficeratasoftwarecompanytomovetoas
(1)Wehaveallbeeninstructedtowashourhandsbeforeeatingtoavoidingesting"germs."Microorganisms(bacteria,protozoa,an
PassageOne(1)TheChestnutTreewasalmostempty.Arayofsunlightslantingthroughawindowfellondustytable-tops.I
Allpeoplehavesomeabilitytomanagetheirhealthandthehealthofthosetheycarefor.Meanwhile,withtheincreasingcomple
TheAmericanpublicdemandedthatthegovernmentadopta________foreignpolicyinhandlingrelationswiththeMiddleEast.
随机试题
A.身热恶热B.日晡潮热C.身热夜甚D.身热不扬E.午后低热
女性,7岁,不慎跌倒时以手掌撑地,倒地后自觉右肘上部剧烈疼痛,大哭,被立即送往医院。体检可见上臂成角畸形,轻度肿胀,肘后三角关系正常,不敢用右手取物。除了X线片外,作出该诊断的主要依据是()
建设项目的环境影响评价文件自批准之日起超过()年,方决定该项目开工建设的,其环境影响评价文件应当报原审批部门重新审核。【2008年真题】
关于存货监盘的说法中,正确的是()。
房管局的设计图纸有问题。导致甲乙两户地基重叠。多次诉讼和调解无果,领导派你去处理。你打算怎么处理?
太平天国运动爆发的原因中没有()。
根据对最新卫星云图的分析,早前预报的“梅花”台风下周将正面影响上海的情况不一定会发生。以下()项最接近题干所表述的含义。
希腊化时期的文化
Whatifsomeonecameupwithanewtechnologyproductthatwashailedasabreakthroughwiththepotentialtorivalthesmartpho
Peoplewhoarehitbylightningandsurviveoftenhavelong-termeffects.Thesemayincludememoryloss,sleepdisorders,muscle
最新回复
(
0
)