SectionBPassage1Questions11through13arebasedonthefollowingpassage:11. A: Theydon'ttrustothers. B: Itisexpensivetohirelabor. C: Theydon'tliketobehelped. D: Theycandobetterthanothers.

Theydon’thave______newbooks.Theyonlyhavesomeoldones.[    ] A: some B: any C: many D: much

Kathy:DoesyourcompanydobusinessinMexico?Timothy:No,______.ButwedobusinessinCanada. A: itdoesn’t B: theydon’t C: wedon’t

(First-pricesealed-bidauction)Aliceissellingher2000chevroletcavaliertoherfriends,BobandCharles.BobattachesavalueofS$8,000toAlice'soldcar,whileCharles'svalueofthecarisS$10,000.(ThesevaluationsarecommonknowledgebetweenBobandCharles.)Alicedesignsthefollowingauctiontosellhercar:First,sheaskseachofthemtowritehisbidonapieceofpaper.ThenBobandCharlesgivetheirbids(nonnegativeintegers)toAlice.NoticethatwhenBobandCharleswritedowntheirbids,theydon'tknoweachother'sbid(socalled'sealedbid').AfterAlicereceivesthesealedbids,thebidsareshowntoeveryone,andthecarwillbesoldtothepersonwhohasthehigherbidatthepriceequaltohisownbid.Whenthereisatie(BobandCharlesbidthesameamount),thenAlicewouldflipafaircointodecidewhowillgetthecar. InthisgameBobbids7999andCharlesbids8000isaNashequilibrium.

Americaisamobilesociety.FriendshipsbetweenAmericanscanbecloseandreal,yetdisappearsoonifsituationschange.Neithersidefeelshurtbythis.BothmayexchangeChristmasgreetingsforayearortwo,perhapsafewlettersforawhile—thennomore.Ifthesametwopeoplemeetagainbychance,evenyearslater,theypickupthefriendship.ThiscanbequitedifficultforusChinesetounderstand,becausefriendshipsbetweenusflowermoreslowlybutthenmaybecomelifelongfeelings,extending(延伸)sometimesdeeplyintobothfamilies.Americansarereadytoreceiveusforeignersattheirhomes,sharetheirholidays,andtheirhomelife.Theywillenjoywelcomingusandbepleasedifweaccepttheirhospitality(好客)easily.AnotherdifficultpointforusChinesetounderstandAmericansisthatalthoughtheyincludeuswarmlyintheirpersonaleverydaylives,theydon’tshowtheirpolitenesstousifitrequiresagreatdealoftime.Thisisusuallytheoppositeofthepracticeinourcountrywherewemaybegenerouswithourtime.Sometimes,we,ashosts,willappearatairportseveninthemiddleofthenighttomeetafriend.Wemaytakedaysofftoactasguidestoourforeignfriends.TheAmericans,however,expresstheirwelcomeusuallyathomes,buttrulycannotmanagethetimetodoagreatdealwithavisitoroutsidetheirdailyroutine.Theywillprobablyexpectustogetourselvesfromtheairporttoourownhotelbybus.Andtheyexpectthatwewillphonethemfromthere.Oncewearriveattheirhomes,thewelcomewillbefull,warmandreal.Wewillfindourselvestreatedhospitably.FortheAmericans,itisoftenconsideredmorefriendlytoinviteafriendtotheirhomesthantogotorestaurants,exceptforpurelybusinessmatters.Soaccepttheirhospitalityathome!1.Thewriterofthispassagemustbe______.A.anAmericanB.aChineseC.aprofessorD.astudent2.WhichofthefollowingstatementsisTRUEaccordingtothepassage?A.FriendshipsbetweenAmericansusuallyextenddeeplyintotheirfamilies.B.FriendshipsbetweenAmericansusuallylastforalltheirlives.C.Americansalwaysshowtheirwarmtheveniftheyareverybusy.D.Americanswillcontinuetheirfriendshipsagainevenafteralongbreak.3.FromthelasttwoparagraphswecanlearnthatwhenwearriveinAmericatovisitanAmericanfriend,wewillprobablybe______.A.warmlywelcomedattheairportB.offeredaridetohishomeC

PartIIReadingComprehension(60points,2pointseach)Directions:Thereare6passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).Youshoulddecideonthebestchoice.PassageOneQuestions21to25arebasedonthefollowingpassage.Theunderseaworldisverybeautiful.Nowmoreandmorepeoplewanttodiveinthewatertofindthesecretthere.Scubadivingisanewsporttoday.Itcantakeyouintoawonderfulunderseaworld.Youwillfindmanystrangeanimalsinthesea.Someareaslargeasaschoolbus.Manyseaanimalsgiveoutlightinthedarkandsomehavesharpteeth.Duringtheday,thereisenoughlight.Here,underthesea,everythingisblueandgreen.Whenfishswimnearby,youcancatchthemwithyourhands.Whenyouhavebottlesofaironyourback,youcanstayindeepwaterforalongtime.However,youcan’tdivetoodeep.Andyoumustbeverycarefulwhenyoudiveindeepwater.Thedeepseaisnotaneasyplacetolivein.It’scold,andit’sdark,too.Thedeeperitis,thelesssunlightthereis.Atabout3,000feet,thereisnolightatall.Itisverydarkinthesea.Manyfisheshavenoeyes.Somehavebigeyes.Afewhaveeyesononeside.Besidesthecoldandthedarkness,deep-seaanimalsfaceathirddanger—otheranimals.Animalseat!Theymustfindfoodtoeat.Manyanimalseatplants.However,someanimalseatmeat.Thismeanstheseseaanimalshavetwobigjobs.Theyneedtofindanimalsasfood,andtheyhavetotrynottobecomeotheranimals’meal.21.Whydopeoplewanttodiveinthesea?Because__________.A.theywanttocatchfishB.theywanttofindthesecretsoftheunderseaworldC.theseaisdeepD.thereareallkindsofplantsinthesea22.Inthedaytime,whenyoudiveinthesea,you__________.A.canseeeverythinggreenandblueB.can’tbeindangerC.cancatchnothingD.can’tseeanythingclearly23.Howmanydangerswillanimalsmeetinthedeepsea?A.OneB.Two.C.ThreeD.Four24.WhichofthefollowingisNOTtrue?A.Oneanimalfindssomethingtoeat,anditmaybeeatenbyothers.B.Atthedepthof3,000feetunderthesea,manyanimalscanfindtheirwaybyhearingandfeeling.C.Thedeepertheseais,thedarkerandcolderitis.D.Atthedepthof3,000feetunderthesea,allanimalscanfindtheirwaybyseeing.25.Allthedeep-seaanimalseatplants,don’tthey?__________A.Yes,theydo.B.No,theydon’t.

函数的定义域是/ananas/latex/p/1132315: (-∞, -3)∪(-3, +∞)|(-∞, -3)∪(-3, 3)∪(3, +∞)|(-∞, -3)∪(3, +∞)|(-∞, 3)∪(3, +∞)

智慧职教: 按自然数的乘法按定义计算3×5. 解   由定义5知3x5=(3x4) 3 =[(3x3) 3] 3 ={[(3x2) 3] 3} 3 ={{[(3x1) 3] 3} 3} 3 ={{[(3 3) 3] 3} 3} ={[(6 3) 3] 3} =(9 3) 3 =12 3=15 上述计算是（   ）的

3√3—/3√3/

下列各项中，哪一项不是Kirsch边缘检测中构建的模板（） A: [5 5 5；-3 0 -3；-3 -3 -3] B: [-3 5 5；-3 0 5；-3 -3 -3] C: [5 5 5；-3 -3 0；-3 -3 -3] D: [-3 -3 -3；-3 0 -3；5 5 5]