[单选题]下面哪一个不是JAVA语言所具有的特点。( )

A、没有全变量,在类的定义外部没有任何的变量定义
B、不直接支持指针操作,而使用更安全的引用类型
C、具有自动垃圾手机功能
D、支持子类对父类的多继承

参考答案： D

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