第一盒中有4个红球6个白球，第二盒中有5个红球5个白球，随机地取一盒，从中随机地取一个球，求取到红球的概率。
随机地取一盒，则每一盒取到的概率都是0.5，所求概率为：p=0.5×0.4+0.5×0.5=0.45
暂无解析
John'sscoreonthetestisthehighestintheclass;he____lastnight.
The____populatedareawasabreedingplaceforinfectiousdiseases.
Humanbeingsaresuperiortoanimals_____theycanuselanguageasatooltocommunicate.
Writing:
InChina,torestorelostpropertytoitsoriginalownerisregardedasoneofthemostcherishedvirtues.However,thedraftpropertyrightslawstipulatesthatpropertyOwnersshouldpaysomemoneytotheonewhoreturnstheproperty.Isitadeviationfromtraditionalvalues?Writeacompositionofabout400wordstostateyourview.
Inthefirstpartofyouressayyoushouldstateclearlyyourmainargument,andinthesecondpartyoushouldsupportyourargumentwithappropriatedetails.Inthelastpartyoushouldbringwhatyouhavewrittentoanaturalconclusionormakeasummary.
Youshouldsupplyanappropriatetitleforyouressay.
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