52.High-speed printers, optical character readers, computer-controlled robots, package scanners, and UPC scanners can all be considered peripheral devices.

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141.The screen shown in the figure above displays a( )_interface,which simply
displays a "prompt" and waits for
users to type commands.

A、　command-line

B、　operator-input

C、　user-input

D、　operator-command

答案：A

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52.High-speed printers, optical character readers, computer-controlled robots, package scanners, and UPC scanners can all be considered peripheral devices.

A. 正确

B. 错误

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141.The screen shown in the figure above displays a( )_interface,which simplydisplays a "prompt" and waits forusers to type commands.

141.The screen shown in the figure above displays a( )_interface,which simply
displays a "prompt" and waits for
users to type commands.