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The lower-level classes （known as subclasses or derived classes） （ ） state and behavior from the higher-level class （known as a super class or base class）.
A.request B.inherit C.invoke D.accept
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The lower-level classes(known as subclasses or derived classes) ( )state andbehavior from the higher-level class(known as a super class or base class).A.request
B.inherit
C.invoke
D.accept
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