七选五阅读专练20篇文档

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1、七选五任务型阅读专练（一）PASSAGE-1Beforegoingoutsideinthemorning,manyofuscheckawindowthermometer(温度计)forthetemperature.Thishelpsusdecidewhattowear.__71__.Wewantourfoodtobeacertaincoldnessintherefrigerator（冰箱）.Wewantitacertainhotnessintheoven.Ifwedon’tfeelwell,weuseathermometertos

2、eeifwehaveafever.Wekeepourroomsacertainwarmthinthewinterandacertaincoolnessinthesummer.Notallthethermometersusethesamesystemtomeasuretemperature.WeuseasystemcalledtheFahrenheitscale（刻度）.ButmostothercountriesusetheCentigradescale.Bothsystemsusethefreezingandboilingpoin

3、tsofwaterastheirguide.__72___.Themostcommonkindofthermometerismadewithmercury(水银)insideaclearglasstube.Asmercury(oranyotherliquid)becomeshot,itexpands.Asitgetscolder,itcontracts(收缩).Thatiswhyonhotdaysthemercurylineishighintheglasstube.___73___.First.Takeaclearglassjui

4、cebottlethathasacap;fillthebottlewithcolouredwater.Tapaholeinthecenterofthecapusingahammerandthicknail.Putthecaponthejar.Thenstickaplasticstraw(吸管)throughthenailhole.__74__.Finally.Placeawhitecardontheoutsideofthebottleandbehindthestraw.Nowyoucanseethewaterlevereasily

5、.__75__.Asthetemperaturegoesdown,thewaterwillcontract,andtheleverinthestrawwillcomedown.Perhapsyouwillwanttokeeparecordofthewaterleverinthestraweachmorningforaweek.A．Weuseanddependonthermometerstomeasurethetemperatureofmanyotherthingsinourdailylives.B．Thermometersmeas

6、uretemperature,byusingmaterialsthatchangeinthesamewaywhentheyareheatedorcooled.C．Nowthatyouknowthisruleyoucanmakeathermometerofyourownthatwillwork.D．Thewaterwillriseinthestraw.Asthetemperatureoftheairgoesup,thewaterwillexpandandriseevenhigher.E．Theylabeltheseindiffere

7、ntways.OntheFahrenheitscalewaterfreezesat32degreesandboilsat212degrees.OntheCelsiusscalewaterfreezesat0degreesandboilsat100degrees.第21页共21页F．Takewax(youmayuseanoldcandleifyouhaveone)andmeltsomeofitrightwherethestrawisstruckintothecaptoseal把..粘住)themtogether.G．Peopleus

8、ethermometerswhicharemadebythemselveswhentravellingaroundtheworld.PASSAGE-2TheInternethasopenedupawholenewonlineworldforusto