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【多选题】
在C#中，关于继承和接口，以下说法正确的是( )A.
C#允许多接口实现，也允许多重继承
B.
C#允许多接口实现，但不允许多重继承
C.
C#不允许多接口实现，但允许多重继承
D.
C#不允许多接口实现，也不允许多重继承
E.
C#只允许单继承
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