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1、Unit4Astronomy:thescienceofthestarsⅠ.阅读理解A(2018河南许昌模拟)Whileastronautsinspacegettodomanyexcitingthings,theymissoutonordinarythingsthatwealltakeforgranted—beingabletowalkonfirmground,hangingoutwithfamilyanddiggingintoasliceofhotsteamingpizza.Thoughnotmuchcanbedoneaboutthefirsttw
2、othings,theremaysoonbeasolutiontothethirdone,thankstothiscool3Dpizzaprinter!Aboutayearago,NASAoffered$125,000toAnjanContractor,a3Dtechnologyexpert,tobuildadevice(设备)thatwouldallowastronautstomakepizzaondemand.Themechanicalengineerpromisedthathisinventionwouldproducepiesinlarge
3、quantitiesthatlooked,tastedandevensmelledlikepizzamadeincommonovens.Latelastyear,theengineerpresentedavideoofhisfirstprototype(原型)thatbeginsbycreatingasinglesliceofdough(面团)thatiscookedandprintedatthesametime.Thencomesthetomato“sauce”—amixoftomatopowder,oilandwaterandfinally,a
4、proteinslicethatresemblescheese.Whilethevideodoesn’tshowthebakingprocess,theinventorsaysthatoncethepizzaisprinted,itcanbereadytobeconsumedin7seconds.Whilethepieinthevideolooksdeliciousenoughtoattractanypizzalover,AnjanContractorisfarfromreadyforastronauts.That’sbecausehestillh
5、astofindasolutiontomakethefoodcontainerintheprinterlastfor30years.Thoughthatmaysoundunrealistic,actuallyitisnot.AnjanContractorbelievesthattheonlywaythatispossibleisthatthewaterisremovedfromalltheingredients(配料)andthentheyarereducedtothepowderform.This,asyoucanimagine,willnotb
6、esoeasy.But,whiletheprintermaynotbereadyforspace,itcertainlylooksreadyenoughforpeopleonearth.Hopefully,NASAandContractorwillconsidersellingittothosenotfortunateenoughtogotoMars!1.Whydoestheauthormentionthethingsthatastronautsinspacecannotdo?A.Toaskusnottotakecommonthingsforgra
7、nted.B.Toshowtheyliveadifficultlifethere.C.Toshowtheirlifeisboringinspace.D.Tointroducethetopicofthetext.2.NASAoffered$125,000toAnjanContractormainlyto . A.createsomenewtypeof3DprinterB.attractmorecompaniestoworkforNASAC.helpastronautsinspaceenjoyfreshpizzaonedayD.producepiz
8、zainlargequantitiestoearngreatprofits3.Thebiggestchallengetha
