According to the discoveries of the astronomers, when did galaxies form? According to the passage, the "hierarchical" theory of

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问题 According to the discoveries of the astronomers, when did galaxies form?
According to the passage, the "hierarchical" theory of galaxy formation suggests that big, bright galaxies formed as ______.

选项

答案smaller galaxies collided and merged

解析根据题干中的关键词“hierarchical”theory定位到最后一段，可得答案。

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大学英语六级

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According to the discoveries of the astronomers, when did galaxies form? According to the passage, the "hierarchical" theory of

大学英语六级

Howdidthespeakerfeelwhenheranhisfirstmile?Hefeltitwasthe______thinghehadeverdone.

Ifyouwishtoapplyforastudentvisa,youshouldfillinFormIM2AwhichyoucangetfreeofchargefromthenearestBritish

A—BuyerBehaviorI—IdeaGenerationB—MarketSegmentationJ—PressConferencesC—TargetAudienceK—Point-of-PurchaseAdvertisingD

Itisimportantthathe(be)______calledbackimmediately.

Thefollowingisalistoftermsrelatedtoautomobile.Afterreadingit,youarerequiredtofindtheitemsequivalenttothose

Priceisamajor(considerate)______forpeopleinbuyinganything.

1．事由：欢迎美国学生来我校参观。2．时间：6月22日上午9：00至13：00。3．人数：约35人。4．具体安排：WordsforReference：接待室receptionroom欢迎会welcomeparty食堂student

Supermarketsaretryingoutnewcomputersthatmakeshoppingcartsmoreintelligent.Theywillhelpshoppersfindcupsortoilet

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