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] 【C4】
选项
A、particular
B、peculiar
C、vast
D、prominent
答案
C
解析
巨大的。
转载请注明原文地址:https://tihaiku.com/zcyy/3823616.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
[originaltext]W:Dr.Smith,thankyouforcomingtoourprogram.M:Mypleasure
[originaltext]Inrecentyears,BillGateshasgivenfinancialsupporttoim
下列行为中,不属于法律行为的有()。A.2013年10月7日,强台风“菲特”登陆
超声图像中显示的胎盘为 A.完全性前置胎盘 B.部分性前置胎盘 C.边缘性
确诊疟疾最简便而迅速的方法是()A.血涂片 B.吖啶橙荧光染色法 C.
1.题目:小学《喜洋洋》片段教学 2.内容: 3.基本要求: (1)试
甲公司80分以上的比例比乙公司多百分之几: A11% B14% C15%
张某购买一商铺用于出租经营,在商铺购买中,银行提供了贷款额20万元、贷款期限10
有爆炸危险的厂房、仓库采取有效的防爆措施。下列措施符合要求的是()。A.散发较空
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
最新回复
(
0
)