单项选择题

Which of the following printers requires a specialized paper in order to operate?（）

A.Thermal
B.Laser
C.Inkjet
D.Impact

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单项选择题

Which of the following is the correct connector for an internal floppy drive?（）

A. 50-pin SCSI
B. 40-pin ribbon
C. 34-pin ribbon
D. 4-pin SATA

单项选择题

Which of the following ports is the default for HTTP?（）

A.21
B.25
C.80
D.110

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