2. 计算机
  3. (72)is an important concept since it allows reuse of a class definition without requiring major code changes．

(72)is an important concept since it allows reuse of a class definition without requiring major code changes．

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问题 (72)is an important concept since it allows reuse of a class definition without requiring major code changes．
选项 A、Inheritance
B、Polymorphism
C、Encapsulation
D、Datahiding
答案A
解析 继承是一个重要的概念，因为它使得无需对代码做大的改变就能重用类定义。
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