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簡述B/S模式的工作過程。

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客戶端通過Web瀏覽器向Web服務器發出服務請求,服務器調用業務處理程序完成業務邏輯的處理:

在業務邏輯處理當中如果要對數據進行操作,則需要想數據庫服務器發起數據處理請求:

當業務邏輯處理完成后,會將處理結果返回給Web服務器,服務器根據處理結果構建出展示界面,并將該頁面傳給瀏覽器,由瀏覽器最終展示給用戶。

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PartIIICloze Directions:Therearetwentyblanksinthefollowingpassage.Foreachblanktherearefourchoices.ChoosetheonethatbestfitsintothepassageandthenmarksyouranswerontheAnswerSheet. Whatmakesachildspeakalanguagehaslongbeenapuzzletolinguists.61speaking,therearetwoschoolsoflinguists,bothofwhomtrytoexplain62achildpicksupalanguagesoeasily.Thefactthatachildpicksalanguage63is64:Atoneyearold,achildisabletosay“bye-bye”;attwo,heisabletousefifty;bytherehebeginsto65tenses.ThefamousAmericanlinguistNoamChomsky66thathumanbeinghaveasortofbuilt-insystemforlanguageuse,andthatthe67is68.Childrenarenottaughtlanguage69theyaretaughtarithmetic.Otherlinguists,70,holdtheviewthatachildlearns71ofhislanguagefromthehintsintheenvironment.72,theoristsofbothschools73thatthereisabiologicalbasisforlanguageuse.The74iswhichismoreimportant,theinnerabilityortheenvironment.Thisiscertainlyafield75tobeexplored.Researchersfrombothschoolsarebusyfindingevidenceto76theirowntheory,but77sideispersuadingtheother. Itseemsthatinorderto78whyachildlearnsalanguagesoeasily,wehaveto79thejointeffortsofbothschools.Somelinguist,likeDeVilliers,hasrecognizedthevalueofcooperation,and80linguistsofbothsidestoworktogether. 61.A.SurprisinglyB.PersonallyC.ProperlyD.Roughly 62.A.thatB.whenC.whyD.how 63.A.independentlyB.naturallyC.withouthelpD.withease 64.A.confusingB.surprisingC.questionedD.suspected 65.A.masterB.studyC.haveD.get 66.A.doubtsB.believesC.realizesD.criticizes 67.A.helpB.teacherC.environmentD.hint 68.A.quiteessentialB.veryimportantC.notnecessaryD.onlysecondary 69.A.asB.forC.whenD.though 70.A.inparticularB.asaresultC.howeverD.therefore 71.A.alittleB.someC.nothingD.most 72.A.BeforeB.FromnowonC.JustnowD.Bynow 73.A.suspectB.disagreeC.agreeD.realize 74.A.caseB.argumentC.problemD.question 75.A.waitingB.planningC.neverD.unlikely 76.A.provideB.createC.supplyD.support 77.A.notaB.oneC.neitherD.either 78.A.findoutB.ruleoutC.searchforD.lookfor 79.A.getridofB.trustinC.relyonD.persistin 80.A.orderedB.criticizedC.challengedD.urged
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Passage2 Questions6to10arebasedonthefollowingpassage: Whenaluminumwasfirstproducedaboutahundredandfiftyyearsago,itwassodifficulttoseparateformtheoresinwhichitwasfoundthatitspricewashigherthanthatofgold.Thepriceremainedhighuntilanewprocesswasdiscoveredforrefiningthemetalwiththeaidofelectricityapproximatelythreequartersofacenturylater.Thenewmethodwassomuchcheaperthataluminumbecausepracticalformanypurposes,oneofwhichwasmakingpotsandpans. Aluminumislightweight,rustproofandeasilyshapedintodifferentforms.Bymixingitwithothermetals,scientistshavebeenabletoproduceavarietyofalloys,someofwhichhavethestrengthofsteelbutweighonlyonethirdasmuch. Today,theusesofaluminumareinnumerable.Perhapsitsmostimportantuseisintransportation.Aluminumisfoundintheengineofautomobiles,inthehullsofboats.Itisalsousedinmanypartsofairplanes.Infact,thehuge“airbus”planeswouldprobablyneverhavebeenproducedifaluminumdidnotexist.Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheamountoffuelneededtomovethem,Aluminumisalsobeingusedextensivelyinthebuildingindustryinsomecountries. Sincealuminumissuchaversatile(多用的)metal,itisfortunatethatbauxite(鋁土礦),whichisoneofitschiefsources,isalsooneoftheearth’smostplentifulsubstances.Asthesourceofaluminumisalmostinexhaustible,wecanexpectthatmoreandmoreuseswillbefoundforthisversatilemetal. 6.Thepriceofaluminumwassharplyreducedwhenpeoplediscoveredanewrefiningprocesswiththeaidof. A.windB.solarenergyC.hydraulicpowerD.electricity 7.Aluminumis. A.lightweight,rustproofbutnoteasilyshapedintodifferentforms B.heavyweight,rustproofandeasilyshapedintodifferentforms C.lightweight,rustproofandeasilyshapedintodifferentforms D.lightweightandeasilyshapedintodifferentformsbutitiseasytobecomerusty 8.WhichofthefollowingisNOTtrue? A.Aluminumiswidelyusedintransportation. B.Aluminumisalsousedinmanypartsofairplanes. C.Aluminumisbeingusedextensivelyinthebuildingindustry. D.Aluminumisnotusedinitspureform. 9.Aluminumisfoundonearthmostlyintheformof. A.puremetalB.bauxiteC.goldD.liquid 10.Whatisthepassagetalkingabout? A.Thefeaturesofaluminumanditsfunctions.B.Theprocessofaluminum. C.Thediscoveryofaluminum.D.Thepromisingfutureofaluminum.
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練習次數:0次
Passage3 Questions11to15arebasedonthefollowingpassage: About70millionAmericansaretryingtolossweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeoplegoonideas.Thismeanstheyeatlesscertainfoods,especiallyfatsandsugars.Otherpeopleexercisewithespecialequipment,takedietpills,orevenhavesurgery.Losingweightishardwork,anditcanalsocostalotofmoney.SowhydosomanypeopleintheUnitedStateswanttoloseweight? ManypeopleintheUnitedStatesworryaboutnotlookingyoungandattractive.Formanypeople,lookinggoodalsomeansbeingthin.Otherpeopleworryabouttheirhealth.Manydoctorssaybeingoverweightisnothealthy.ButareAmericansreallyfat?Almost30millionAmericansweightatleast20percentmorethantheiridealweight.Infact,theUnitedStateisthemostoverweightcountryinthewild.“ThestoredfatofadultAmericansweight2.3trillionpounds,”saysUniversityofMassachusettsanthropologist(人類學家)GeorgeArmelagos.Hesaysburningoffthatstoredenergywouldproduceenoughpowerfor900,000carstogo12,000miles. Losingweightishardwork,butmostpeoplewanttofindafastandeasywaytotakeofffat.Bookstoresselllotsofdietbooks.Thesebookstellreadershowtoloseweight.Eachyear,dozensofnewbookslikethesearewritten.Eachoneboaststohelppeopletogetridoffat. 11.WhichofthefollowingisNOTmentionedasawayoflosingweight? A.Toeatlessfatsandsugars.B.Toworkhard. 12.ManyAmericansaretryingtoloseweightbecause. A.theywanttolookattractiveB.theyaremisledbydoctors C.theywanttokeepfitD.bothAandC 13.Thefiguresgiveninthesecondparagraphsuggestthat. A.AmericansaredependentoncarsB.carsconsumealotofmoney C.AmericansneedloseweightD.excessoffatcanbeasourceofenergy 14.Itcanbeinferredfromthelastparagraphthat. A.dietbooksarenotalwayseffectiveB.dietbooksareusuallyhelpful C.therearelotsofwaysoflosingweightD.bookstoresarekeepingtheirpromises 15.Itcanbeconcludedfromthepassagethat. A.peoplethinktoomuchoftheirappearance B.thereisnotasurewayoflosingweightasyet C.surgeryisthefastestwayoflosingweight D.goingondietisasafewayoflosingweight
試題分類: 大學英語四級
練習次數:1次
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