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1、阅读理解AFromfaroutinspace,Earthlookslikeablueball.Sincewatercoversthree-fourthsoftheEarth’ssurface,blueisthecolorweseemost.Thecontinentslookbrown,likesmallislandsfloatinginthehuge,bluesea.WhitecloudscoveraroundtheEarthlikealightblanket.TheEarthisshapedlikeasphere,oraball.
2、Itis25,000milesaround!Itwouldtakemorethanayeartowalkaroundthewholeplanet.Aspaceshipcanflyaroundthewidestpartofthesphereinonly90minutes.EventhoughspaceshipshavetraveledtotheMoon,peoplecannotvisittheMoonwithoutspecialsuits.TheMoonhasnoairorwater.Plantsandanimalscan’tlive
3、thereeither.AstronautsfirstlandedontheMoonin1969.Afterthat,thereweresixmoretripstotheMoon.TheybroughtbackMoonrocks,whichscientistsarestillstudying.Thereareholes,orcraters,allovertheMoon’ssurface.Scientistsbelievethatmeteorites（陨石）smashedintotheMoonmillionsofyearsagoand
4、formedthecraters.TheSunisthecloseststartoEarth.Astarisahotballofburninggas.TheSunlooksverybigbecauseitissoclose.ButtheSunisjustamedium-sizedstar.Billionsoffar-awaystarsaremuchbiggerthanourSun.TheburninggasesfromtheSunaresohotthattheywarmtheEarthfrom93millionmilesaway!E
5、venthoughtheSunisalwaysshining,thenighthereonEarthisdark.That’sbecausetheEarthrotates,orturnsaround,every24hours.Duringtheday,theEarthfacestheSun.Thenweseelight.Duringthenight,theEarthturnsawayfromtheSun.Thenitfacesthedarknessofspace.EachdaywelearnmoreabouttheEarth,the
6、MoonandtheSun.56.WhenwelookattheEarthfromouterspace,thecolorweseemostisbluebecause________.A.mostoftheEarthiscoveredinlandB.theSun’sraysmaketheEarthlookblueC.mostoftheEarthiscoveredinwaterD.cloudswraparoundtheEarth57.What’sthemeaningoftheunderlinedword“smashed”inthesec
7、ondparagraph?A.crashedB.madeC.brokeD.got58.WhatcausesdaylightonEarth?A.ThefullMooncausesdaylight.B.DaylightiscausedbytheEarthfacingawayfromtheSun.C.TheheatoftheSun’srayscausesdaylight.D.DaylightiscausedbytheEarthfacingtowardtheSun.59.WhichofthefollowingsentencesBESTdes
8、cribestheSun?A.TheSunlookssmallbecauseitissofarfromEarth.B.TheSunisaballofburninggasesthatgivestheEarthheatandlight.C
