当a=1，b=2，c=3时，执行if（a>c）b=a;a=c;c=b;语句后，a、b、c的值分别为

计算单筋矩形截面受弯构件时，当Ɛ>Ɛb时应（）

一、单项选择题（共10小题，每题1分，共10分）1、下列变量中不属于离散型变量的有（）

三、判断题（根据题意判断打“√”或“X”，请把正确的答案填入相应的答题框内，共10小题，每小题1分，共10分）1.产品成本是指企业在一定的时期内，为生产一定量产品而发生的各项生产费用。（）

9.如果a=5，b=6，则执行表达式max=(a>b)?a:b后max的值为6。（）

设集合A={a,b,c}，A上的二元关系R={<a,a>,<b,b>}不具备关系（）性质。

地形测量中，若比例尺精度为B，测图比例尺1：M，则比例尺精度与测图比例尺大小的关系为

一、判断题（根据题意判断打“√”或“X”，请把正确的答案填入相应的答题框内，共10小题，每小题2分，共20分）1、主键可以重复，也可以为空值（）。

2.在板的平法注写中，贯通纵筋以B打头，代表板()的钢筋。

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.　　

1-1.What’sthemainfunctionofthefirstsentenceinthepassage?

1-2.Howmanycountriesarementionedinthepassage?

1-3.DroughtshavehadinfluencesondevelopedcountriesEXCEPTthat_____.

1-4.Whatinfluenceshavedroughtshadonlessdevelopedcountries?