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
2023-11-22
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] 【C14】
选项
A、attracting
B、weighing
C、attracted
D、weighed
答案
C
解析
现在分词的用法。
转载请注明原文地址:https://tihaiku.com/zcyy/3209058.html
相关试题推荐
(1)ScientistssayChandraprovidesfirstevidencethattwomysteriescancoe
(1)ScientistssayChandraprovidesfirstevidencethattwomysteriescancoe
(1)ScientistssayChandraprovidesfirstevidencethattwomysteriescancoe
(1)ScientistssayChandraprovidesfirstevidencethattwomysteriescancoe
PASSAGETHREE[br]Whatistheconclusionofthewholepassage?Governmentshould
PASSAGETWO[br]Whatistheconclusionofthelastparagraph?Weshouldbreakdo
[originaltext]I:Havetheygotanyconclusionastohowpeopleshouldinteract
[originaltext]I:Havetheygotanyconclusionastohowpeopleshouldinteract
PassageTwo[br]Whatistheconclusionofthispassage?Despitealltheeffo
PassageTwoWhatconclusionmightbedrawnaboutthecurrentmodelsonmalar
随机试题
______yourrequestforarefund,wehavereferredthatmattertoourmainoffic
Whileagentsandeditorsoften______theirmarketandsometimesrejectgoodorev
Shewassoobstinatethatshewouldn’tadjustheropinions.A、inflexibleB、alert
(Give)______betterattentioninthecoldweather,thoseanimalscouldhaveavo
[originaltext]M:Billhasonlybeenonthejobaweek,andalreadyhe’sactingl
下列关于稽留流产的处理,不正确的是A.可按黄体酮功能不足给予黄体酮治疗 B.处
患者,女性,28岁。已婚,平素月经规律,停经50天,突发右下腹剧烈撕裂样疼痛,伴
下列运输投资项目经济评价指标中,属于动态指标的是()。A.单位成本 B
劣质成本由()构成。 A.内部损失和外部损失成本 B.不增值的预防成本和鉴
学校文化是怎样形成的?
最新回复
(
0
)