英語閱讀綜合作業(yè)及答案

英語閱讀一綜合作業(yè)IReadeachofthefollowingparagraphsanddecidewhatthetopicis.Thendecideonthegeneralstatement(themainidea)theauthormakesaboutthetopic.10*3（30分）1.Whatexactlyisanetwork?Intheworldofcomputers,anetworksimplymeanstwoormorecomputerslinkedtogetherinsomeway.Thisallowspeopleindifferentplacestocommunicatewitheachotherandtosharedataandresources.Forexample,aschooloranofficemighthaveabigcentralcomputer,calledaserver.Itstoresvariousprogramsandfiles.Ifsomeoneonthenetwork,usinganothercomputer,wantstouseoneofthefilesontheserver,hisorhercomputerwouldretrievethatfilefromtheserver.Topic:

Mainidea:2.Forestsarenotjustimportantfortimber.Aforestactslikeagiantsponge,absorbingrainfallandpreventingitfromrunningawayintorivers.Itthenreleasesthewaterslowlybyevaporationfromitsleaves.Thishelpstostabilizetherainfallofareasdownwindfromtheforest.Forestcoveralsopreventsthesoilbeingeroded(wornaway)andsiltingupriversandlakes.Byholdingbackthewater,theforestpreventsdisastrousfloodingfurtherdownstream.Topic:

Mainidea:3.Wheneveryouhearasound,findoutwhereitcomesfromandwhatcausesit.Wemakesoundsbymakingthingsmoveto-and-fro.Thisto-and-fromovementiscalledvibration.Itmeansmovingupanddownorforwardsandbackwardsveryfast.Thesevibrationscausetheairtovibrate.Thismakessoundwaves.

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Mainidea:II.Guessthemeaningofthewordsaccordingtothecontext.(20分)10*2Whalesareenormousanimals.Youcannotimaginehowbigsomewhalesare.A.hugeB.funnyC.strongAlcoholissomewhataddictive,sobecarefulwhenyoutakeit.Don’ttaketoomuch.A.poisonousB.habit-formingC.healthful3．IusuallybrowsethroughthenewspaperswhenIhavemybreakfast.A.readquicklyB.readseriouslyC.readcarefully4．Therehasbeenaboominexportsthisyear;theincreaseistremendousA.fallB.growthC.mistakeHeisveryleanandthusweak,comparedwithothergirlsintheclass.A.prettyB.uglyC.thinFamousforherbigsmile,shehasacheerfuldisposition.A.methodB.disposalC.characterSheisverygrumpywhenhertoothaches.Yesterday,hertoothachedagain,andshequarreledwithherfriendoveraveryunimportantthing.A.excitedB.carefulC.bad-temperedWithreluctancetheboywenttoseeadoctorwithhisfather.A.ImpatientlyB.UnwillinglyC.ImmediatelyThewomanteacher’smelodiousvoiceattractedthestudents’attention.A.melancholyB.interestingC.pleasantDon’tjudgeamanbythecompanyhekeeps,sometimeshemayhavefriendswhoareverydifferentfromhim.A.organizationB.businessfirmC.friendsIIIReadingComprehension:(50分)10*5PassageOneHowdidcomputingmachinesbeginanddevelop?Theanswertothisquestionisfairlyclear.Thefirstcomputingmachine,inusemorethan5000yearsago,wasthefingersandhandsofpeople.Butthisusefulandnaturalcomputingmachinewasnotequaltokeepingtrackofallthenumbersthatpeopleneededfromtimetotime.Peopleneededbiggernumbersthanhandscouldshow;andtheyneededtobeabletostoreandremembernumbers,withoutalwayskeepingtheirfingersincertainpositions.Sootherideasanddevicesappeared.Thenextideawastousesmallstonesorshells,seedsorbeads,tocountwith.Thenapersoncouldtalkaboutsomelargenumber(ofchickensinaflockorsheepinaherd)as"thenumberofbeadsonhisstring,"evenifhehadnosimplenameforthenumber.However,peoplefoundittroublesometocountonlyinunits,onebyone.So,veryearly,inancientEgypt,anotherideaappeared.Thiswastheideaofchoosinganewunitequalto10oftheoldunits.Clearly,thisideacomesfromthefactthatamanhas10fingers;andsoapersoncouldtalkaboutthenumber76byreferringtoallthefingersofsevenmenandsixmorefingersononemoreman.Inordertohandlenumbersintheformofasetofcountedthings,itishelpfultohaveafixedplaceinwhichtolaythemout.Suchaplacemaybeasmoothpieceofground,aflatpieceofstone,oraboard.Itishelpfultoarrangelinestomarkoffplaces－oneplaceforunits,anotherplacefortens,athirdplacefortensoftens(orhundreds),andsoon.Butitisnotveryconvenienttouseaboard:amongotherreasons,oftenwhenyoumovetheboard,thecountersfalloff.Sowhynotuseaframewithlittlesticks,putholesthroughthecounters,andstringthemasbeadsonthesticksintheframe?Thissimpleinventionmakesawidelyusefulmachineforfiguring,theabacus.Itisstillthemostcommoncomputingmachineandisusedallovertheworld.Inancienttimesanotherreallyimportantideawasnoticed－theideaofzero,thenumberofnone,ornothing.Itnamesaplaceontheboardofcountersthatisemptyofcounters.Withoutthisidea,nogoodcomputingmachinecanbemade.附答案要點I1.topic:(Computernetworks)

Mainidea:(Anetworkli