问题:
Given:
Which two methods, inserted individually, correctly complete the Three class?()
A . public void foo() {}
B . public int foo() { return 3; }
C . public Two foo() { return this; }
D . public One foo() { return this; }
E . public Object foo() { return this; }
Given:
Which two methods, inserted individually, correctly complete the Three class?()
● 参考解析
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