如果需求价格弹性为2.5，说明该产品很适合采用降价促销策略。

居住小区宅间路宽度一般不低于2.5米

设全集U={1,2，3，4，5}，集合A={1，2，5},则∁UA=()

设全集U={1,2，3，4，5}，集合A={1，2，5},则A的补集为()

5、滑坡的机制是某一滑移面上剪应力超过了该面的抗剪强度所致。

以下哪几项属于促使一国向外国承包商开放本国建筑市场的主要原因？

8.1997年5月。著名的“人机大战”，最终计算机以3.5比2.5的总比分将世界国际象棋棋王卡斯帕罗夫击败，这台计算机被称为（）。

5.“40A”即“FormofDocumentaryCredit”指“跟单信用证类型”共有以下填法（）

3.一般来说，微信排版采用2倍和2.5倍的行间距视觉体验最佳。（）

AIDS’ThreattoAsiaGrows　　NEWDELHI-Justafewyearsago.Malawasatypicalmiddle-classIndianhousewife.Shecooked,cleanedandlookedafterhertwosmallchildren.　　Lastyear,herlifetookatragicturn.HerhusbanddiedofAIDS;shewasfoundoutHIV-positive(爱滋病病毒检验呈阳性反应)andhermother-in-lawtookherchildrenawayfromher,sayingtheywouldgetthedisease.“Whenfriendsdroppedforavisit,shewouldintroduceme,saying,‘Sheismyson’swidow.ShehasAIDS,’”saidMala.AIDSisnowdescribedas“explosive(炸药)“aroundtheworld.AstudyofahospitalintheportcityofDurbaninSouthAfrica,wheretheworld’sbiggestandAfrica’sfirstAIDSconferenceopenedlastSunday,foundthatalmosthalfthebedsinmedicalwards(病房)wereoccupiedbyAIDSpatients.　　SouthAfricahasoneoftheworld’sfastestgrowingHIVinfections(传染),with1,700peopleinfecteddaily,addingtothe4.3million,or10percentofitspopulation,livingwithHIV.Untilnow,AsiahasbeenmoresuccessfulinholdingtheAIDSvirus(病毒)thanAfrica,wherethediseasehaskilledabout12millionpeople.　　AIDSisnowthreateningtosurroundmanyofAsia’spoverty-strickencountries.CountriesinAsia,suchasCambodia,andThailand,haveHIVinfectionspeedsover1percent.Butthelowspeedshidehugenumbersofaffectedpeople,becauseofthepopulationbase.　　InIndia,forexample,3.7millionareinfected,morethaninanyothercountryexceptSouthAfrica.InChina,anestimated500,000people,mainlydrugusers,livewithHIV/AIDS.GordonAlexander,asenioadvisorforUNAIDSinIndia,estimates(估计)thatthenumberhitbyAIDSinAsiawillclimbabouteightmillionoverthenextfiveyearsfromaboutsixmillion.　　InmanyAsiancountries,thebattleagainstHIVisasocialandculturaloneagainstpublicdiscussionofsexualhealthputanationwidemediacampaignintoACTiontolimitthespeedofHIVthroughunsafesex.BrentonWong,anofficialforSingapore’sACTionforAIDS,saystheACTualHIVincidenceinthecitystateof3.9millionpeopleisatleasteighttimeshigherthanofficialdata.”Shameanddenyisstillvery,verycommonsopeopleareafraidtogettestedandmanytimeswon’teventelltheirfamiliesiftheytestpositive,”saidWong.5.WhyarepeopleafraidofbeinginfectedbyAIDS?　　a.BecausepeoplewhohaveAIDSarelookeddownupon.　　b.Becausetheywillsufferalot.　　c.Becausetheywilldiesoonerorlater.　　

AIDS’ThreattoAsiaGrows　　NEWDELHI-Justafewyearsago.Malawasatypicalmiddle-classIndianhousewife.Shecooked,cleanedandlookedafterhertwosmallchildren.5.WhyarepeopleafraidofbeinginfectedbyAIDS?　　a.BecausepeoplewhohaveAIDSarelookeddownupon.　　b.Becausetheywillsufferalot.　　c.Becausetheywilldiesoonerorlater.　　

2-5.Whatconclusioncanbedrawnfromthepassage?

Life’sallaboutmakingconnectionsReadthearticlebelowaboutsomenewnetworkinggroupsspecificallyforbusinesswomen.ChoosethebestwordA,BorCtofillthegaps1-10.Toyou,networkingmightmean(1)____aconferenceortradefaireventtomeetnewclientsorpartners.Oritcouldbethecoffeebreakatworkwhereyoushare(2)_____withcolleaguesinotherdepartments.Butnowadaysnetworkinghasbecomeaneventinitself.Forexample,PricewaterhouseCoopersofferitsfemalestaffaformalnetworking(3)_____calledPwCwomen.With900members,itorganizeseventsrangingfrominformaldrinkseveningstocoachingevents.TinaHallet,whois(4)_______forthegroup,saysthatshegotinvolved(5)________networkingBecause‘I’dgottoareasonablyseniorlevelandIwantedtohelpotherpeopletomaximizetheirpotential.’Youdon’thavetobeseniorto(6)_____anetworkthough.VickyWoodandSallyHopkinshadtheideafortheCityGirlsNetworkwhentheyfirstmovedintoLondon’scorporateworldandwonderedhowtogetto(7)______otherwomen.‘Wecouldn’tfindanythingforpeoplewithnoexperience.Sowethoughtwe’dstartourown.’Fromtwelvefriendsmeetingregularly,itrapidlygrewto250membersfrommanydifferentorganizations.It’sagreatwayto(8)_____usefulcontactsandbringinpotentialbusiness.FionaClutterbuckisco-chairofanetworkforthebankABNAMRO.‘Womentendtothinkofnetworkingas(9)_______andgiveitlowpriority.’butgiventhechance,womenwillnetwork–asthebank’slast‘speednetworking’eventdemonstrated.‘Withover100womenandmen,itwasagreat(10)_____.Itisamazinghowmanypeopleyougettomeetfromdifferentpartsoftheorganization.’TinaHalletsaysthatshegotinvolved(5)________networkingbecause‘I’dgottoareasonablyseniorlevelandIwantedtohelpotherpeopletomaximizetheirpotential.’

InternationalArtConsultantInternationalArtConsultant(1)_____in1979,InternationalArtConsultantshasbeensourcingandcommissioningart(2)______forover25years.Wework(3)______clientsinthecorporate,hotel,healthcareandurbanregeneration(4)_______.Ourclients(5)______frommultinationalcompanieswith£1millionartbudgetstoorganizationsrentingartforjust£10aweek.A(6)______offourteen,wearesmallenoughtocareandlargeenoughtocope.Weoffera(7)______combinationofcommercialexperience,specialistartknowledgeandhighqualityserviceandsupport.Whateverthesizeoftheprojectour(8)______isforallourclientstobe100%satisfiedwiththeendresult.Over75%ofourworkcomesfrom(9)______businessorreferrals.Weworkalongsideprofessionalartistswhocreateartofthehighestartisticandtechnicalquality,andallourstaffhavedifferentareasofspecialistartknowledgeandexpertise.Wehopethatyouwill(10)______anappointmenttovisitus,lookroundthegalleries,usethevisualreferencedatabases,anddiscussyourparticularartrequirementswithus.Readaboutacompanythatdealswithartintheworkplace.CompletetheinformationwithanswersA,B,CorD.Ourclients(5)______frommultinationalcompanieswith£1millionartbudgetstoorganizationsrentingartforjust£10aweek.

表达“从一个关系的所有行中提取出满足某些条件的行”，“从一个关系的所有列中提取出某些列”“提取出属于一个关系但不属于另一关系的所有元组”“将两个关系必须按照某种条件串接成一个较大的关系”的操作依次是（）。1、并2、交3、积4、选择5、投影6、差7、连接