试题详情
- 单项选择题The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a | -b ] Which of the following statements is true regarding this entry?（）
A、Either the -a or flag -b may be used, but not both.
B、If the flag -a is used then the flag -b also must be used.
C、One of the -a or -b flags must be used, but not both at the same time.
D、Both the flags may be used together, but neither are mandatory.
- D
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