Stack is quite simple. Many computer systems have stacks built into their circuitry. They

Question

Stack is quite simple. Many computer systems have stacks built into their circuitry. They also have machine-level instructions to operate the hardware stack. Stack is(73)in computer systems.

A．useless

B．not important

C．simple but important

D．too simple to be useful

Answer 1

正确答案：C
解析：本题含义可表述为，栈是相当简单的，后两句从意思上看是计算机如何实现栈，实际说栈是计算机组成的一个必要的部分，最后一句是对前面三句的归纳。所以应该选择　C(简单并重要的)。