单项选择题 Which of the following channels, when used in close proximity to one another, provide the BESTprotection against crosstalk?（）

单项选择题 A technician is installing a processor upgrade onto an Intel 775 socket motherboard. Which of the following extra power connectors needs to be plugged in for the board to power on?（）

单项选择题 Which of the following expansion cards would MOST likely require the use of an external powerconnector to function properly?（）