单项选择题
A. Multi-mode fiber
B. CAT6
C. CAT5e
D. Single-mode fiber
单项选择题 Which of the following transmits a digital signal?（）
多项选择题 Which of the following voltages can be measured from a Molex connector on the power supply?（）
单项选择题 A user downloads a 4.1 GB ISO image from a website. Which of the following media types isrequired for the user to burn the image?（）