单项选择题
When creating a class that associates a set of keys with a set of values， which of these interfaces is most applicable？（）
A.Collection B.Set C.SortedSet D.Map
单项选择题 Underwhichcircumstanceswillathreadstop？（）
多项选择题 Whichdeclarationswillallowaclasstobestartedasastandaloneprogram？（）
多项选择题 Whichstatementsaretrueconcerningthedefaultlayoutmanagerforcontainersinthejava.awtpackage？（）
