A.We should drink more hard water. B.We should drink more soft water. C.Ground water is good for the elderly people. D.Ground water has to be treated before we drink it.
【简答题】在做进栈运算时,应先判别栈是否 A ;在做退栈运算时,应先判别栈是否 B 。当栈中元素为 n 个,做进栈运算时发生上溢,则说明该栈的最大容量为 C 。 注:答案直接填数字1,2,3,4 供选择的答案: A , B :1空 2 满 3 上溢 4 下溢 C : 1 n-1 2 n 3 n+1 4 n/2