若在PRIVATE Y后加一条PRIVATE X语句,则程序执行后的显示结果为 ______。A.20 30B.40 50C.20 50D.40 30

若在PRIVATE Y后加一条PRIVATE X语句,则程序执行后的显示结果为 ______。

A.20 30

B.40 50

C.20 50

D.40 30


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