Computer hardware engineers research, design, develop, and test computer hardware and supervise its manufacture and (73) . Hardware refers to computer (74) , circuit boards, computer systems, and related equipment such as keyboards, modems, and printers.

A．chips

B．frame

C．structure

D．cell

企业安全生产管理机构指的是生产经营单位内设的专门负责（）的机构。

A．安全生产

B．安全生产监督管理

C．安全生产控制

D．生产管理