单项选择题

A ______ is used to communicate with another computer over telephone lines.

A．keyboard
B．modem
C．mouse
D．printer
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单项选择题
Maintenance activities include ______. ①making enhancements to software products ②developing a new software product ③correcting problems ④adapting products to new environments
A．①②
B．①③④
C．②③④
D．①②③④
单项选择题
A quality assurance team should be ______. ①associated with any particular development group ②depended upon any particular development group ③responsible for reporting directly to management ④in-depended upon any particular development group
A．①②
B．②③
C．③④
D．①②③④
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