Stack is quite simple. Many computer systems have stacks built into theircircuitry. They also have machine-level instructions to operate the hardwarestack. Stack is （ ）in computer systems.
A、useless
B、not important
C、simple but important
D、too simple to be useful
时间：2022-01-02 14:17关键词：
答案解析
C 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）•
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