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用圆形及圆内扇形的面积来表示数值大小的图形是______。
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扇形统计图是用整个圆表示用圆内各个扇形的大小表示．
[中国民生银行]用圆形及圆内扇形的面积来表示数值大小的图形是
圆形图
直方图
条形图
折线图
饼图是利用圆形及圆内扇形的来表示数值大小
面积
弧线长度
角度
颜色
_______________是用圆形及圆内扇形的角度表示数值大小的图形
在变量值极少的场合在一个圆形内以顶点在圆心的扇形的相对面积即占整个圆形面 积的比例表示概率大小以扇形
饼形图
柱形图
条形图
直方图
扇形统计图是用来表示总数用圆内各个扇形的大小来表示所占的百分数．
用圆形及圆内扇形的面积来表示数值大小的图形是
折线图
条形图
直方图
圆形图
饼图
以圆形面积为总量用圆饼内的各扇形面积表示分量的图形常常用于表示企业能源总量的构成
曲线图
直方图
饼形图
扇形图
用矩形的宽度和高度即面积来表示分组数值变量分布的图形由于反映的是数值变量 而非分类变量故矩形间的间隔
柱状图
条形图
直方图
面积图
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2011年我国全年货物进出口总额36421亿美元比上年增长22.5%其中出口18986亿美元增加20.3%进口17435亿美元增长24.9%进出口差额出口值与进口值差额的绝对值1551亿美元比上年减少265亿美元 2007—2011年我国全年货物出口额与上一年相比增长超过30%的年份有.
Livinginthedesertinvolvesalotofproblemswatershortageistheworst
AlthoughwealreadyknowagreatdealaboutinfluenzaandalthoughtheWorldHealthOrganizationisconstantlycollectingdetailedinformationfromitschainofinfluenzareferencelaboratoriesthroughouttheworlditisextremelydifficultforepidemiologists流行病专家whostudyinfectiousdiseasetopredictwhenandwherethenextfluepidemicwilloccurandhowsevereitwillbe. TherearethreekindsofinfluenzavirusknownasABandC.InfluenzaCvirusisrelativelystableandcausesmildinfectionsthatdonotspreadfarthroughthepopulation.TheAandBtypesareunstableandareresponsiblefortheepidemicsthatcausefrequentconcern.Followinganyvirusattackthehumanbodybuildsupantibodieswhichconferimmunitytothatstrainofvirusbutaviruswiththecapacitytochangeitscharacterisabletoby-passthisprotection.VariabilityislessdevelopedintheinfluenzaBviruswhichaffectsonlyhumanbeings.AninfluenzaBvirusmaycauseawidespreadepidemicbutwillhavelittleeffectifintroducedintothesamecommunitysoonafterwardssincenearlyeveryonewillhavebuiltupantibodiesandwillbeimmune.TheinfluenzaAviruswhichaffectsanimalsalsoisextremelyunstableandisresponsibleforsomeoftheworstoutbreaksofthediseasesuchastheunparalleledpandemicorworldepidemicof1918-1919whenabouthalftheworld’spopulationwereinfectedandabouttwentymillionpeoplediedsomefrompneumoniacausedbythevirusitselfandsomefromsecondarycomplications并发症causedbybacteria. Accuratepredictionisdifficultbecauseofthecomplicationofthefactors.Aparticularvirusmayberelatedtoonetowhichsomeofthepopulationhavepartialinvolvedimmunity.Theextenttowhichitwillspreadwilldependonfactorssuchasitsownstrengthorvirulencetheeasewithwhichitcanbetransmittedandthestrengthoftheoppositionitencounters.Scientistshoweverhaveareliablegeneralpictureoftheworldsituation.InfluenzaAattacksusinwaveseverytwoorthreeyearswhileinfluenzaBwhichtravelsmoreslowlylaunchesitsmainassaultseverythreetosixyears.Theoutbreaksvaryfromisolatedcasestoepidemicsinvolvingatenthormoreofthepopulation.Wemayconfidentlyprophesythatsoonerorlaterlargenumbersofpeoplewillbefeelingtheunpleasanteffectsofsomekindofinfluenzavirus. AccordingtotheauthorwhichofthefollowingisNOTtrueaboutinfluenza
某些媒分子通过使环绕肺气管的骨肉细胞收缩来抵御有毒气体对肺部的损害这使得肺部部分封闭起来当这些媒分子被不必要的激活时对某些无害的像花粉或家庭粉尘做出反应就出现了哮喘病有一项计划是开发一种药物通过阻碍接受由上文所说的媒分子发出的信息来防止哮喘病的发生以下哪一项如果是正确的将指出这项计划的最严重的缺陷
Vingotookabusandheadedforhomeifhiswifewouldhavehimback
Prolonginghumanlifehasincreasedthesizeofthehumanpopulation.Manypeoplealivetodaywouldhavediedofchildhooddiseasesiftheyhadbeenbornahundredyearsago.Becausemorepeoplelivelongertherearemorepeoplearoundatanygiventime.Infactitisadecreaseindeathratesnotanincreaseinbirthratesthathasledtothepopulationexplosion. Prolonginghumanlifehasalsoincreasedthedependencyload.Inallsocietiespeoplewhoaredisabledortooyoungortoooldtoworkaredependentontherestofsocietytoprovideforthem.Inhuntingandgatheringculturesoldpeoplewhocouldnotkeepupmightbeleftbehindtodie.Intimesoffamineinfantsmightbeallowedtodiebecausetheycouldnotsurviveiftheirparentsstarvedwhereasiftheparentssurvivedtheycouldhaveanotherchild.Inmostcontemporary当代的societiespeoplefeelamoralobligationtokeeppeoplealivewhethertheycanworkornot.Wehaveagreatmanypeopletodaywholivepasttheageatwhichtheywanttoworkorareabletowork;wealsohaveruleswhichrequirepeopletoretireatacertainage.Unlessthesepeoplewereabletosavemoneyfortheirretirementsomebodyelsemustsupportthem.IntheUnitedStatesmanyretiredpeopleliveonsocialsecuritycheckswhicharesolittlethattheymustliveinnearpoverty.Olderpeoplehavemoreillnessthanyoungormiddle-agedpeople;unlesstheyhavewealthorprivateorgovernmentinsurancetheymustoftengoonwelfareiftheyhaveaseriousillness. Whenolderpeoplebecomesenileortooweaktocareforthemselvestheycreategraveproblemsfortheirfamilies.Inthepastandinsometraditionalculturestheywouldbecaredforathomeuntiltheydied.Todaywithmostmembersofahouseholdworkingorinschoolthereisoftennooneathomewhocancareforasickorweakperson.Tomeetthisneedagreatmanynursinghomesandconvalescent康复的hospitalshavebeenbuilt.Theseareoftenprofit-makingorganizationsalthoughsomearesponsored赞助byreligiousandothernonprofitgroups.Whileafewoftheseinstitutionsaregoodmostofthemaresimplydumpinggroundsforthedyinginwhichcareisgivenbypoorlypaidoverworkedandunder-skilledpersonnel. Itcanbelearnedfromthepassagethatinsometraditionalsocieties
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