单项选择题 Which of the following steps would be performed FIRST to install a fresh copy of Windows 7Professional on a new hard drive?（）

单项选择题 A manufacturer has instructed a technician to update the software that resides on the flash ROMchip of an integral system add-in component. Which of the following types of software needs to be updated?（）

单项选择题 Which of the following characteristics must be matched depending on the specifications of thepower grid for the country a PSU will be utilized in?（）