单项选择题
Which of the following will help dissipate heat through the heat sink when upgrading a CPU? （）
A. Case fan B. Thermal compound C. Motherboard riser D. Power supply
单项选择题 Which of the following printers requires a specialized paper in order to operate?（）
单项选择题 Which of the following is the correct connector for an internal floppy drive?（）
单项选择题 Which of the following ports is the default for HTTP?（）
