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16、friendsseearticleCommunityhealthcarecontinueseducationtestanswerstatistics52009-08-1113:1867.Themostpracticalwaytoreducethe
17、samplingerroris(a).A.increaseobservationnumberappropriatelyB.controlindividualvariationC.StrictlyselecttheobservedobjectsD.Examineeachindividualinthepopulation68.A,B,C,D68.Thesubjectofepidemiologicalstudywas(c).A.diseaseB.thepatientC.peopleD.ahealthyperson69.A,B,C,Db69.Thephotochemicalsmogi
18、ncidentinLosAngelesbelongsto().ChronicactionAcuteactionC.forwardactionD.Teratogenation70.A,B,C,D70.Thefollowingisnotmentaldisability(a).A.blindB.intellectualdisabilityC.PersonalitydisabilityD.mentalillness71.Thelargerthestandarderrorofthemean,themeanvalueofthesampleobtainedinthissampling(c)
19、.A.ThegreatertheerrorofthesystemB.ThegreaterthereliabilityC.ThelargerthesamplingerrorD.Comparabilityisworse72.A,B,C,D72.Theteratogenicsensitizationperiodis(c).A.thefirstmonthofpregnancyB.thefirsttwomonthsofpregnancyC.thefirstthreemonthsofpregnancyD.Thefirstfourmonthsofpregnancy73.A,B,C,D73.
20、Thelargerthesamplecontentinthesamepopulation,thesmallerthetheoretical(c).A.samplestandarddeviationB.themedianC.standarderrorD.mean74.A,B,C,D74.Comparingthevariationofheightandweight,theappropriateindicatoris(b).A.poorStandarddeviationofB.C.QuarterspacingD.VariationcoefficientA,B,C,D75.Which
21、ofthefollowingisnotthephysiologicalfunctionofvitaminA(c)?A.ParticipateinthesynthesisandregenerationofretinalrhodopsinB.maintainnormalvisionC.regulatecalciumandphosphorusmetabolismD.maintainthenormalstructureandfunctionofepithelialcells76.A,B,C,D76.Tertia
