问题
单项选择题
设有4个元素组成的序列{1，2，3，4}顺序进栈(进栈过程中可以出栈)，下列______的出栈序列是正确的。
A．2,3,4,1
B．3,1,2,4
C．3,4,1,2
D．4,2,1,3
答案
参考答案：A
解析：[分析] 根据栈操作先进后出的特点可知：选项B中3不能在2之前出栈；选项C中1不能在2前出栈；4不能在3前出栈。
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设有4个元素组成的序列{1，2，3，4}顺序进栈(进栈过程中可以出栈)，下列______的出栈序列是正确的。
A．2,3,4,1
B．3,1,2,4
C．3,4,1,2
D．4,2,1,3
参考答案：A
解析：[分析] 根据栈操作先进后出的特点可知：选项B中3不能在2之前出栈；选项C中1不能在2前出栈；4不能在3前出栈。
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| There are 1 new students in our school. They are 2 American, Canada and Australia. They 3 a little Chinese. They often teach 4 English and we teach them Chinese. We often talk to each 5 in English or in Chinese. We learn a lot from each other. They like sports very much. They often play football or basketball on Sunday. 6 they go boating or fly kites. They play games with 7 students. Look! One of the Australian girls 8 dancing now. All the other boys and girls are singing with their Chinese schoolmates (同学). They like China and Chinese food very much. They're very 9 and they're good 10 of the Chinese people. | ||||
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