同一消息可以调用多种不同类的对象的方法，这些类有某个相同的超类，这种现象是（ ）。
- A.类型转换
- B.映射
- C.单态
- D.多态
正确答案及解析
正确答案
解析
多态指相同的对象收到不同的消息或者不同的对象收到相同的消息时产生的不同的实现动作。
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