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1、5A版优质实用文档一 Thediagramsbelowshowthestagesandequipmentusedinthecement-makingprocess,andhowcementisusedtoproduceconcreteforbuildingpurposes. Summarisetheinformationbyselectingandreportingthemainfeatures,andmakecomparsonswherereleant. Thefirstdiagramindicatesthestagesandequipmentintheprocessofmakingceme
2、nt,andthesecondoneillustrateshowcementandothermaterialsaremixedtoproduceconcreteforbuildingpurposes. Cementproductioninvolvesthefollowingsteps.Thefirststepistoputlimestoneandclayontwodifferentconveyors.Then,thesetwotypesofmaterialsarepressedintothecrusherwhichbreaksthemintopowder.Afterthat,thepowder
3、ispouredintoamixer,andthenmixturesaretransmittedintoarotatingheaterwhichworkswithheat.Thefollowingstepisthatabandcarrierleadstheheatedpowdertoagrinderwherethecementcomesout.Finally,cementispackedintobags,andtheprocessisfinished. Concreteproductionismuchmoresimple.Fourdifferentkindsofmaterialsareneed
4、edindifferentproportion.Gravelaccountsforthelargestpart,at50%,followedbysand,whichis25%.Cementandwatercontributes15%and10%respectively.Thefourmaterialsarethenmixedandpouredintoaconcretemixerandafteraperiodofwhirling,concreteisproduced. Inconclusion,makingcementhasmorecomplexprocessthanmakingconcrete
5、thoughconcreteneedsmorematerialsthancement.二 Thediagramsbelowshowthelifecycleofthesilkwormandthestagesintheproductionofsilkcloth. Summarisetheinformationbyselectingandreportingthemainfeatures,andmakecomparisonswhererelevant. Thefirstdiagramshowsthattherearefourmainstagesinthelifeofthesilkworm.Firsto
6、fall,eggsareproducedbythemothandittakestendaysforeacheggtobecomeasilkwormlarvathatfeedsonmulberryleaves.Thisstagelastsforuptosixweeksuntilthelarvaproducesacocoonofsilkthreadarounditself.Afteraperiodofaboutthreeweeks,theadultmothseventuallyemergefromthesecocoonsandthelifecyclebeginsagain. Thecocoonsa
7、retherawmaterialusedfortheproductionofsilkcloth.Onceselected,theyareboiledinwaterandthethreadscanbeseparatedintheunwindingstage.Eachthreadisbetween300and900metreslong,whichmeanstheycanbetwistedtogether,dyedandthenusedtoproduceclothintheweavingstage. Overall,thediagramsshowthatthecocoonstageofthesilk
8、wormcanbeusedtoproducesilkcloththroughaverysimpleprocess.三 Theflowchartbelowshowshowchewinggumismade. Summarisetheinformationbyselectingandreportingthemainfeaturesandmakecomparisonswhererelevant. Thediagramshowshowchewinggumisproduced.Firstlytheingredientsofgumareputintoacontainerandwasheateduntilth
9、eyformasinglemass.Thisisthenstraineduntilalloftheliquidhasbeeneliminated.Next,thegumispassedintoanothercontainer/placeandthedesiredflavorings,sweetenersandsoftenersareaddedThismixtureisblendeduntilalloftheingredientsaremixedtogether.Thegumthentravels/passestoadifferentmachinewhichusesrollerstoflatte
10、noutthegum.Finallythethinsheetsofgumarecutintorectangularshapesandbrokenintoseparatepiecesthenthegumpasses/travelsalongaconveyorbeltwhereitisenclosedinpackagingreadyfordistribution.四 Thediagrambelowshowshowfruitiscanned. Summarisetheinformationbyselectingandreportingthemainfeaturesandmakecomparisons
11、whererelevant. Thediagramshowstheprocessofcanningfreshfruit.Firstthefruitispickedfromtreesbyhand.Itisthentransportedtothecannerybylargetrucks.Atthecannerythefruitiswashedandqualitychecked,andanypoorqualityfruitisrejected.Thegoodqualityfruitisputintocoldstorage.Whenitisreadyforcanningthefruitisweighe
12、dandgraded.Thegradingensuresthatfruitofasimilarsizeiskepttogether.Afterthisthefruitispeeledandthecoresareremoved.Itisthenslicedintotherequiredsizesandputintocans.Juiceorsyrupisalsoaddedtothecans.Oncethecanshavebeenfilled,theyaresealedandcookedoverheattoensurethatthecansaresterilized.Whenthecansareco
13、ol,labelsareattachedandtheyareplacedintostorages.Thecannedfruitisnowreadytobedespatchedtosupermarketsandsold.五 Thediagrambelowshowstheprocessofmakingchocolate. Summarisetheinformationbyselectingandreportingthemainfeaturesandmakecomparisonswhererelevant. Chocolatesvariedflavours,colours,shapesandtext
14、uresresultfromdifferentrecipetraditions.Whichhaveevolvedindifferentpartsoftheworld.Theessentialingredientinallchocolateiscocoa,whichismadefromthecream-colouredbeansthatgrowinpodsonthecacaotree.Thecacaotree,whichgrowsinequatorialregionssuchasSouthAmerica,AfricaandIndonesiaproducesafruitaboutthesizeof
15、asmallpineapple,Insidewhicharethetreesseeds. Afterharvesting,thecocoabeansarcremovedfromthepodsandpiledinheapsthatareleftforseveraldaystodry.Thedriedbeansarethentransportedtofactorieswheretheyaresortedandroasted.Theshellsarethenremovedandthebeansaregroundintochocolateliquor-athickbrownliquidwhichfor
16、msasolidataboutroomtemperature.Thisliquorcontainsahighpercentageoffat(cocoabutter),whichisremovedbyusingpresses.Thesolidblockofcocoathatremainsisthenmadeintoapowderwhichcanbeusedtomakeahotchocolatedrink,orismixedbackwithsomeofthecocoabutter,sugarandotherflavoursuchasvanillatomakethedifferentkindsofchocolate.六 Thediagrambelowshowstheprocessbywhichbricksaremanufacturedforthebuildingindustry. Summarisethein
