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A贷款
B企业存款
C通货
D证券投资

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论述中国红色政权存在和发展的原因与条件

YouarecreatingaWindowsFormsapplicationforinventorymanagementbyusingthe.NETFramework3.5.Theapplicationprovidesaformthatallowsuserstomaintainstockbalances.Theformhasthefollowingfeatures：
（1）AdatasetnameddsStockBalancetostorethestockinformation
（2）AbusinesscomponentnamedscInventory.
ThescInventorycomponentprovidesamethodnamedSave.YouneedtoensurethatonlythemodifiedstockbalancesofdsStockBalancearepassedtothescInventorySavemethod.
Whichcodesegmentshouldyouuse？（）

YouarecreatingaWindowsapplicationbyusingthe.NETFramework3.5.YoucreateaninstanceoftheBackgroundWorkercomponentnamedbackgroundWorker1toasynchronouslyprocesstimeconsumingreportsintheapplication.Youwritethefollowingcodesegmentintheapplication（Linenumbersareincludedforreferenceonly.）
Youneedtowriteacodesegmentthatreportstotheapplicationwhenthebackgroundprocessdetectsanyofthefollowingactions：
（1）Anexceptionisthrown
（2）Theprocessiscancelled
（3）Theprocessissuccessfullycompleted
Whichcodesegmentshouldyouinsert？（）

简述主旨的含义。