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关于函数def getPageNum(file:String) = { var bookMap = Map( ……

关于函数def getPageNum(file:String) = { var bookMap = Map("Chinese" -> 164,"Math" -> 180,"English" -> 150,"Geography" -> 120) bookMap.getOrElse(file,0) },执行错误的是? ()

A.getPageNum(“Math”)=180
B.getPageNum(“Math”)=164
C.getPageNum(“Physics”)=164
D.getPageNum(“Geography”)=120

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