题目：
Computer hardware engineers research, design, develop, and test computer hardware and supervise its manufacture and (72) . Hardware refers to computer (73) , circuit boards, computer systems, and related equipment such as keyboards, modems, and printers.
A．fixing
B．building
C．setting
D．installation
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
