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?（）
单项选择题 Which of the following keys is pressed to enter the Windows boot options after POST?（）
单项选择题 A networking device that sends packets to all connections is a:（）
