单项选择题
A.extends B.implements C.public D.abstract
A.Filelnput Stream B.Objectlnput Stream C.File Output Stream D.Datalnput Stream
A.Null Pointer Exception B.File Not Found Exception C.Array lndex Out Of Bounds Exception D.IO Exception
A.数组越界 B.除零 C.空值操作 D.IO异常
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