问题
单项选择题
（）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
答案
参考答案：B
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)。