1高一阅读理解自然类（1）Putanicecubefromyourfridgeintoaglassofwater.Youhaveapieceofstring（线）10centimeterslong.Theproblemistotakeoutthatpieceoficewiththehelpofthestring.Butyoumustnottouchtheicewithyourfingers.Youmayaskyourfriendstotrytodothatwhenyouarehavingdinnertogether.Thereisasaltcellaronthetable.Youmustusesaltwhenyoucarryoutthisexperiment.Firstyouputthestringacrossthepieceofice.Thenputsomesaltontheice.Saltmakesicemelt（融化）.Theiceroundthestringwillbegintomelt.Butwhenitmelts,itwillloseheat.Thecoldicecubewillmakethesaltwaterfreezeagain.Afteraminuteortwoyoumayraisethepieceofstringandwithityouwillraiseyourpieceofice!Thisexperimentcanbeveryusefultoyou.If,forexample,thereisicenearthedoorofyourhouse,youmustuseverymuchsalttomeltalltheice.Ifyoudon'tputenoughsalt,thewaterwillfreezeagain.1.Wemustusewhenwecarryoutthisexperiment.A.fridgeB.somefoodC.atableD.somesalt2.Howlongwillittaketocarryoutthisexperiment?A.Morethanthreeminutes.B.Fiveminutesorso.C.Onlyoneminuteortwo.D.Abouttenminutes.3.Whatisthetaskofthisexperiment?A.Puttheicecubeintotheglassofwaterwiththehelpofthestring.2B.Takeouttheicecubeintheglassofwaterwiththehelpofthestring.C.Takeouttheicecubeintheglassofwaterwithyourfingers.D.Putsomesaltontheicecubeandthenputthestringacrossit.4.Howmanythingsatleastareusedinthisexperiment?A.Three.B.Four.C.Six.D.Seven.5.Wecanlearnsomethingaboutfromthepassage.A.physicsB.biologyC.chemistryD.maths(2)Bambooisoneofthenature'smostsurprisingplants.Manypeoplecallthisplantatree,butitisakindofgrass.Likeotherkindsofgrass,abambooplantmaybecutverylowtotheground,butitwillgrowbackveryquickly.AJapanesescientistrecordedonebambooplantthatgrewalmost1.5metersin24hours!BamboogrowsalmosteverywhereintheworldexceptEurope.Therearemorethan1,000kindsofbamboothatgrowaroundtheworldonbothmountainsandplains(平原).Notallbamboolooksthesame.Somebambooplantsareverythin.Theymayonlygrowtobeafewcentimeterswidewhileothersmaygrowtomorethan30centimetersacross.Thisplantalsocomesindifferentcolors,fromyellowtoblacktogreen.ManyAsiancountrieshavebeenusingbambooforhundredsofyears.Theyoftenusebambooforbuildingnewbuildings.Asamatteroffact,thecables（绳3索）thatholdupthehangingbridgeacrosstheMinRiverinSichuanaremadeofbamboo.Thebridgehasbeeninuseformorethan1,000years,andisstillholdingstrong.InAfrica,engineersareteachingpoorfarmershowtofindwaterusingbamboo.TheseAfricancountriesneedcheapwaystofindwaterbecausetheyhavenomoney,andtheirfieldsoftendiefromnorainandnowater.Itseemsthatbambooisoneofthebestthingstheycanuse.Bamboopipesanddrills（钻）canhelptomakethepoorthirstyfieldstobewatered.1.Howisbamboolikegrass?A.Itisthinandeasytocut.B.Itgrowseverywhere.C.Itgrowsquicklyafteritscutshort.D.Itisshortandgreen.2.Thesentence“whileothersmaygrowtomorethan30centimetersacross.”means“Someotherbambooplantsmaygrowtobevery.”A.shortB.strongC.thickD.tall3.Fromthetextweknow.A.mostpeoplecallbambooplanttreesB.abambooplantmaygrow4.5metersinthreedaysC.thebambooplantchangesitscolorswhenitgrowsD.abridgeheldbybamboocablewasbuiltthousandsofyearsago4.WhydidtheengineersteachthepoorfarmersinAfricatomakeuseofbamboo?A.Becauseitischeap.B.Becauseitiscolorful.C.Becauseitdrillsfast.D.BecauseitisusedbyAsians.5.WhichofthefollowingisNOTtrue?A.Therearemanydifferentkindsofbamboowithdifferentcolors.4A.likewillowtreesB.Cablesmadeofbamboocanlastforoverathousandyears.C.Bamboocanb...
