单项选择题 Which of the following tools should Mike, a technician, use when testing a serial port?（）

单项选择题 A user would like to use an external monitor with their laptop, but when the monitor is plugged in and connected to the laptop, the screen does not display on the monitor. Which of the following is the BEST way to display an image on both the monitor and the laptop?（）

单项选择题 Which of the following is the administrator’s profile path in Windows 2000?（）