在管理会计中，将决策划分为确定型决策、风险型决策和不确定型决策的分类标志是

6.下图存在的错误是______。A．多个起点节点B．多个终点节点C．有多余虚工作D．节点编号不对

设A={1,2,3}，则A上的二元关系有()个。

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。

8.锤击沉管灌注桩的成孔深度控制，对于端承型桩，应（）。

4.设A为已定义的类名，下列声明A类的对象a的语句中正确的是（）。

（2）计算甲公司当月销售W型空调增值税销项税额的下列算式中，正确的是（　）。A.100×（3480－348）÷（1＋13%）×13%B.100×3480÷（1＋13%）×13%C.100×（3480－348）×13%D.100×3480×13%

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.　　

下列哪种细胞不参与I型超敏反应____

属于II型超敏反应的疾病是____

下列哪种疾病的发病机制主要属于Ⅲ型超敏反应____

I型超敏反应主要引起生理功能紊乱，且有明显组织损伤。

血清病属于II型超敏反应。

若x、a、b和。均是int型变量，则执行表达式x＝（a=1，b=2)后的结果为()

假设一名风险厌恶型的投资者，拥有A公司的股票，他决定在他的资产组合中加入B公司或C公司的股票。这三种股票的期望收益率和总体风险水平相当，B股票与A股票的协方差为了-0.5，C股票与A股票的协方差为+0.5。则下列说明正确的是()。