题目内容：
根据以下材料，回答题 UnderstandingAutism
1．Autism(孤独症)isalife-longdevelopmentaldisabilitythatpreventsindividualsfromproperlyunderstandingwhattheysee,hear,andotherwisesense．Thisresultsinsevereproblemsofsocialrelationships,communication,andbehavior．Individualswithautismhavetopainstakingly(费力地)learnnormalpatternsofspeechandcommunication,andappropriatewaystorelatetopeople,objects,andevents,inasimilarmannertothosewhohavehadastroke.
2．Thecauseofautismisstillunknown．Someresearchsuggestsaphysicalproblemaffectingthosepartsofthebrainthatprocesslanguageandinformationcominginfromthesenses.
Theremaybesomeimbalanceofcertainchemicalsinthebrain．Genetic(遗传的)factorsmaysometimesbeinvolved．Autismmayindeedresultfromacombinationofseveral"causes".
3．Mostpeoplewithmentalretardation(智力迟钝)showrelativelyevenskilldevelopment.
Individualswithautism,however,typicallyshowunevenskilldevelopment,withdeficits(欠缺)incertainareas--mostfrequentlyintheirabilitytocommunicateandrelatetoothers-anddistinctskillsinotherareas．Itisimportanttodistinguishautismfrommentalretardationorotherdisorders,sincediagnostic(诊断的)confusionmayleadtoinappropriateandineffectivetreatmenttechniques.
4．Ingeneral,individualswithautismperformbestatjobswhicharestructuredandinvolveadegreeofrepetition．Somepeoplewhohaveautismareworkingasartists,pianotuners,painters,farmworkers,officeworkers,computeroperators,dishwashers,assemblylineworkers,oremployeesofshelteredworkshopsorothershelteredworksettings.
Paragraph1__________. A．Whatcausesautism?
B．Howcommonisautism?
C．Doesautismoccurtogetherwithotherdisabilities?
D．Whatisautism?
E．Whatkindsofjobscanindividualswithautismdo?
F．Whatisthedifferencebetweenautismandmentalretardation?
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