单项选择题
A technician is servicing a customer’s color laser printer and notices excess toner in the printer.Which of the following tools would BEST assist the technician in removing the excess toner?（）
A. Damp towel B. Compressed air C. Alcohol wipe D. Computer vacuum
单项选择题 Which of the following would BEST provide cooling to a processor?（）
单项选择题 Which of the following should be done FIRST to a hard drive before it is disposed?（）
单项选择题 Which of the following has the HIGHEST connection latency? （）
