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多项选择题

下面中哪两个可以在A的子类中使用:()

A.public int method 1(int a,int b){return 0;}
B.private int method 1(int a,int b){return 0;}
C.private int method 1(int a,long b){return 0;}
D.public short method 1(int a,int b){return 0;}