以下程序输出结果是()。#include<stdio.h>structabc{inta,b,c;};main(){structabcs[2]={{1,2,3},{4,5,6}};intt;t=s[0].a+s[1].b;printf("%d\n",t);}

3.相符提示/交单的要素包括（）

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.3.Accordingtothepassage,themainreasonsthatAIDSspreadinAsiaisthrough_______.

3.Accordingtothepassage,themainreasonsthatAIDSspreadinAsiaisthrough_______.

若向量a=（1，0，5，2），b=（3，-2，3，-4），c=（-1，1，t，3）线性相关，那么t的值为？

已知inta,i；执行语句“i=((a=2*3,a+5),a*3);”后，变量i的值是（）。

有集合s={1,2,3}，python3解释器执行dels[2]的结果为()。A3B2C{1，2}DTypeError:'set'objectdoesn'tsupportitemdeletion

python3解释器执行{1,2,'a'}|{2,3,4}的结果为():A{2,3,4}B{1,2,3,4,'a'}C{1,2,3,4}D{2,3,4,'a'}

python3解释器对列表[1,2,[3,4],5,6]使用reverse方法执行的结果为()。A[6,5,[3,4],2,1]B[6,5,[4,3],2,1]C[6,5,2,1,[3,4]]D报错

python3解释器执行，下面的示例代码后，l2的结果是():>>>importcopy>>>l1=[1,2,[3,4]]>>>l2=copy.deepcopy(l1)>>>l1[2]='a'>>>l2A[1,2,['a',4]]B[1,2,'a']C[1,2,[3,4]]D报错

已知列表x=[1,2,3]，那么执行语句x=3之后，变量x的地址不变。A正确B错误

设关系R与关系S具有相同的目数（或称度数），且相对应属性的值取自同一个域，则R-(R-S）等于（）。

以下程序的输出结果是（）。ls1=[1,2,3,4,5]ls2=[3,4,5,6,7,8]cha1=[]foriinls2:ifinotinls1:cha1.append(i)print(cha1)

已知x=[1,2,3]，那么x*3的值为？（）

当a=1、b=2、c=5、d=5时，执行下面的程序后，x的值是()。if(a<b)if(c<d)x=1;elseif(a<c)if(b<d)x=2;elsex=3;elsex=6;elsex=7;