单项选择题
A. Express card 54
B. USB 2.0
C. PCIe
D. Port replicator
单项选择题 User 1 has a printer connected to a PC. User 2 is requesting the ability to print large documents to that printer. Which of the following is the BEST way for User 2 to gain access to the printer?（）
单项选择题 Which of the following is the form factor of a standard S-video connector?（）
单项选择题 Which of the following is the form factor of a standard VGA connector?（）