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多項(xiàng)選擇題

Which of the following connection types use a phone line as a carrier to provide access to theInternet?（）

A.Cellular
B.Satellite
C.ISDN
D.WiMAX
E.DSL

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多項(xiàng)選擇題

Which of the following is included in the typical laser printer maintenance kit?（）

A. Print head
B. Toner
C. Fuser
D. Main drive assembly
E. Pickup rollers

單項(xiàng)選擇題

A laser printer prints pages with a gray background. Which of the following is the MOST possible cause of the problem? （）

A.Transfer roller
B.Paper type
C.Print head
D.Fuser