()函数不能用于日期/时间类型。
A、MAX
B、MIN
C、COUNT
D、TO_CHAR
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The IBM Systems & Technology value proposition is built on: ()
A、Realize Innovation, Manage Growth Complexity and Risk, Go Green and Save
B、Collaboration, Virtualization, and Ecosystem
C、Innovation, Collaboration, and On-Demand
D、Openness, On-Demand, and Green
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An operator needs to run a script which will write standard output and standard error to different files. Which of the following commands will successfully perform this task?()
A、myscript.ksh 1>/tmp/log/script.log 2>/tmp/log/script.err
B、myscript.ksh $1>/tmp/log/script.log $2>/tmp/log/script.err
C、myscript.ksh 1>/tmp/log/script.log 2>1 /tmp/log/script/err
D、myscript.ksh 2>1 /tmp/log/script.log 2> /tmp/log/script.err
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高等级公路上的通信管道,段长最大不得超过()。
A、150m
B、180m
C、200m
D、250m
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单一方向标准孔(孔径90mm)不多于24孔、孔泾为28mm或32mm多孔管不多于36孔容量时,应选用()。
A、手孔
B、小号人孔
C、中号人孔
D、大号人孔