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【单选题】
下面对派生类和基类的关系描述中,不正确的是( )。
A.
派生类是基类的子集
B.
派生类是对基类的进一步扩充
C.
派生类也可以作为另一个派生类的基类
D.
派生类不但继承了基类的公有成员和保护成员，还继承了私有成员
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is subject to groundless doubts
B.
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