问题
单项选择题
如果进栈序列为e1，e2，e3，e4，则可能的出栈序列是( )。
A．e3，e1，e4，e2
B．e2，e4，e3，e1
C．e3，e4，61，e2
D．任意顺序
答案
参考答案：B
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如果进栈序列为e1，e2，e3，e4，则可能的出栈序列是( )。
A．e3，e1，e4，e2
B．e2，e4，e3，e1
C．e3，e4，61，e2
D．任意顺序
参考答案：B
My father is 40. He is a good driver__26____a good father. My father likes___27__sports very much. Every morning, he__28___and runs in the People’s Park. He also plays basketball. He is so strong and healthy. He always says to me, “Sports can make us strong.” My father loves__29____and his favourite book is Car Fanatics. He likes cars___30___. He wants to have an____31___car. It is his dream. I hope I can buy one__32_____him in the future. I am___33__only daughter, and my father loves me very much. He buys me anything I want. When I make mistakes(犯错误), he never hits(打) me. He says to me_34_____a smile, “_35___do that again,,” We love each other very much. I hope my father can keep healthy forever（永远）.
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