多项选择题
Which of the following bus speeds is used for a PCIe card?（）
A. 1x B. 3x C. 6x D. 8x E. 24x
单项选择题 Which of the following connector types is used with twisted pair cable?（）
单项选择题 Which of the following allows verification of the port that a printer is currently using?（）
单项选择题 Which of the following protocols uses port 80?（）
