单选题
The lower-level classes(known as subclasses or derived classes)________ state and behavior frome the higher-level class (known as a super class or base class).
A、
request
B、
inherit
C、
invoke
D、
accept
【正确答案】
B
【答案解析】
低层的类(也称子类或派生类)从高层类(也称为超类或基类)中继承了状态和行为。
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