单项选择题
A.PUSH入栈,POP出栈B.PUSH出栈,POP入栈C.ADD入栈,SUB出栈D.ADD出栈,SUB入栈
A.寄存器和栈顶指针B.寄存器和栈尾指针C.存储器与栈顶指针D.存储器与栈尾指针
A.C;1B.C;0C.O;1D.O;0
A.Z,1B.Z,0C.N,1D.N,0
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