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單項(xiàng)選擇題

When is it advisable to dump the waste toner from a technicians service vacuum？（）

A.When it is full.
B.It is not recommended.
C.Before performing preventative maintenance.
D.After each call.

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How many CCDs are located in a single pass duplex ADF？（）

A.One
B.2
C.3
D.4

單項(xiàng)選擇題

Which of the following utilities could be used to determine a subnet mask？（）

A.PING
B.NSLOOKUP
C.TRACERT
D.IPCONFIG

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