Given: 
Which two, inserted at line 11, will allow the code to compile?（）
- A、public class MinMax<?> {
- B、public class MinMax<? extends Number> {
- C、public class MinMax<N extends Object> {
- D、public class MinMax<N extends Number> {
- E、public class MinMax<? extends Object> {
- F、public class MinMax<N extends Integer> {
正确答案:D,F
答案解析:有
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