首页
登录
职称英语
Mounting evidence has led astronomers to just an improbable conclusion; At
Mounting evidence has led astronomers to just an improbable conclusion; At
游客
2024-10-30
34
管理
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 [br] 【C10】
选项
A、regardless of
B、in spit of
C、as
D、provided
答案
C
解析
表原因。
转载请注明原文地址:https://tihaiku.com/zcyy/3823622.html
相关试题推荐
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
Mountingevidencehasledastronomerstojustanimprobableconclusion;At
随机试题
RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryrathe
Optimismcanhelpyoutobehappier,healthierandmoresuccessful.Pessimis
AsimplepieceofropehangsbetweensomeenvironmentallyfriendlyAmericans
Accordingtothepassage,mostmealsarenotincludedinthepriceoftoursmain
卫生部设立各类健康相关产品评审委员会,承担健康相关产品的A.研发设计工作 B.
标注的尺寸不是定位尺寸就是定形尺寸。()
可以用已知抗原或抗体来检测特定的相对应的抗体或抗原,是由于抗原抗体反应的A.特异
根据《统计法》的规定,统计调查表应当标明( )等标志。A.表号、制定机关、批准
在合同中应对双方应承担的风险进行明确的界定,一般情况下,下面说法正确的有()A.
缺铁性贫血采用铁剂治疗,观察疗效最早的参考指标是A、血红蛋白上升 B、网织红细
最新回复
(
0
)