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
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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
单项选择题
The basic unit of measure in a computer system is the ______. It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.
A．Kilobyte
B．Bit
C．Gigabyte
D．Megabyte
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