A、A.p0 = p1;
B、B.p1 = p2;
C、C.p2 = p4;
D、D.p2 = (ClassC)p1;
E、E.p1 = (ClassB)p3;
F、F.p2 = (ClassC)p4;
更多“Given:<br /> <img src="https://img.ppkao.com/2018-08/longzhengxuan/201808021132415685.jpg" /><br /> Which three are valid?（）<p> Given:<br /> <img src="https://img.ppkao.com/2018-08/longzhengxuan/201808021132415685.jpg" /><br /> Which three are valid?（）</p>”相关的问题
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