The stack is a special case of priority queues where the element's priority is:栈作为优先级队列的一种特殊情况,其中元素的优先级:
A.Earlier the element is pushed into the stack, the priority of it will be lower. 先入栈者优先级低
B.Elements who is pushed into the stack earlier has higher priority. 先入栈者优先级高
C.All elements have the same priority所有元素优先级相同
D.There is no definite relationship between element priorities元素优先级之间没有确定的关系