问题
填空题
栈的3种基本运算是：入栈、退栈和______。
答案
参考答案：读栈顶元素
解析： 栈的基本运算有三种：入栈、退栈和读栈顶元素。其中，入栈是指在栈顶插入一个新的元素；退栈是指取出栈顶元素并赋值给一个变量；读栈顶元素是将栈元素赋值给一个指定的变量，不删除栈顶元素。
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栈的3种基本运算是：入栈、退栈和______。
参考答案：读栈顶元素
解析： 栈的基本运算有三种：入栈、退栈和读栈顶元素。其中，入栈是指在栈顶插入一个新的元素；退栈是指取出栈顶元素并赋值给一个变量；读栈顶元素是将栈元素赋值给一个指定的变量，不删除栈顶元素。
| 完形填空。 | ||||
| The Winter Olympics was once l the "White" Olympics._2 the first time, many colorful stamps were published (出版; 发行) to mark the event. The first 3 came out on January 25,1932 in the United States for the _4 Winter Olympics. From 5 0n,publishing stamps during the Winter Olympics became a rule. During the 4th Winter Olympic Games,a groupof stamps were 6 in Germany in November,1936. The five rings of the Olympics were drawn on the front of the sportswear.lt was the first time thatthe rings 7 on the stamps of the Winter Olympics. When the Winter Olympics came,the host coun-tries and the nonhost countries published stamps tomark those Games. China published four stamps in February,1980, 8 Chinese athletes began to 9 the Winter Olympics. Different kinds of 10 were drawn on thosesmall stamps. People can enjoy the beauty of the wonderful movement of the athletes. | ||||
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