题目内容

原生环境问题是由于人类生产活动与生活改变了原来的生存环境所引起的一系列环境问题。()

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胃穿孔导致的化脓性腹膜炎,一般在()小时后发生。

A13~14天
B15~16天
C19~21天
D25~27天
E58~60天

Youcreateaclasslibrarythatcontainstheclasshierarchydefinedinthefollowingcodesegment.(Linenumbersareincludedforreferenceonly.)
YoucreateaninstanceoftheGroupclass.Youpopulatethefieldsoftheinstance.WhenyouattempttoserializetheinstancebyusingtheSerializemethodoftheXmlSerializerclass,youreceiveInvalidOperationException.Youalsoreceivethefollowingerrormessage:"TherewasanerrorgeneratingtheXMLdocument."YouneedtomodifythecodesegmentsothatyoucansuccessfullyserializeinstancesoftheGroupclassbyusingtheXmlSerializerclass.YoualsoneedtoensurethattheXMLoutputcontainsanelementforallpublicfieldsintheclasshierarchy.
Whatshouldyoudo?()

甲将某物出借给乙,在出借期内,甲同意将该物出售给乙,属于简易交付。()

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