单项选择题
A. Refill the cartridges
B. Replace the toner
C. Replace the network cable
D. Calibrate the inkjet printer
单项选择题 Which of the following should a technician MOST likely use to test a RS-232 port?（）
单项选择题 The technician has replaced a power supply with an identical power supply, and now the high end graphics card is not working. Which of the following should the technician check?（）
单项选择题 A technician needs to change an existing drive formatted in FAT32 to a NTFS format, whileretaining the data. Which of the following is the BEST way to make this change?（）