问题
单项选择题
下列关于栈的描述正确的是 ______。
A) 在栈中只能插入元素而不能删除元素
B) 在栈中只能删除元素而不能插人元素
C) 栈是特殊的线性表，只能在一端插入或删除元素
D) 栈是特殊的线性表，只能在一端插入元素，而在另一端删除元素
答案
参考答案：C
解析： 栈是特殊的线性表，它的一端封闭，在另一端进行插入和删除操作。
搜题请搜索小程序“爱下问搜题”
下列关于栈的描述正确的是 ______。
A) 在栈中只能插入元素而不能删除元素
B) 在栈中只能删除元素而不能插人元素
C) 栈是特殊的线性表，只能在一端插入或删除元素
D) 栈是特殊的线性表，只能在一端插入元素，而在另一端删除元素
参考答案：C
解析： 栈是特殊的线性表，它的一端封闭，在另一端进行插入和删除操作。
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| In the dining room of my grandfather's house stood a massive grandfather's clock. Meals in that dining room were a 1 for four generations to become one. The table was always 2 with food from wonderful family recipes(食谱) all containing 3 as the main ingredient (成分)And always that grandfather clock stood like a trusted old family 4 , sharing our happiness As I was a child, the old clock 5 me. I watched and listened to it during meals. 1 6 how at different times of the day, that clock would strike with a wonderful 7 .Year after year, the clock struck a part of my 8 , a part of my heart. Even more wonderful to me was what my grandfather did each day. He 9 wound that clock with a special and magic key, which 10 the clock ticking and striking. He never let that clock wind down and 11 . When we grandkids got. a little older, he showed us how to 12 the clock . Several days after my grandfather died. I entered the dining room, with tears flowing 13 .The clock stood desertedly 14 , seeming smaller and not as magnificent as before. I couldn't 15 to look at it. Years later, my grandmother gave me the clock and the key. The old house was quiet. I opened the clock door with my shaking hand. Then 16 , reverently(虔诚地) , I entered the key and wound the clock. It sprang to 17 . Tick - tock: tick - tock, life and chimes were 18 into the dining room, into house and into my 19 . In the movement of the hands of the clock, my grandfather 20 again. | ||||
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