1. [单选题]调用递归过程或函数时，处理参数及返回地址需要用一种称为什么的数据结构。
A. 队列
B. 栈
C. 多维数组
D. 顺序表
2. [单选题]______ is permanently stored in the computer and provides a link between the hardware and other programs that run on the PC.
A. Interface
B. Operating system
C. Internet
D. Applicaion software
