单项选择题

The ______ has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.

A. application


B. information system
C. operating system

D. iterative
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单项选择题
Each box is an activity; the number it contains is the duration of the activity in days. The duration of the critical path is （）.

A. 16 days
B. 14 days
C. 19 days
D. 20 days
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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