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单选题
（）is a property of object-oriented software by which an abstract operation may be performed in different ways in different classes.
A
Method
B
Polymorphism
C
Inheritance
D
Encapsulation
参考答案
参考解析
解析：
该题的关键词为"an abstract operation、 performed in different ways in different classes"，其语句结构为"（）is a property of object-oriented software"，含义为"什么是面向对象软件的一个特性"，结合关键词分析，容易判断这是面向对象中的多态性概念(Polymorphism)。
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