单项选择题
A. The voltage selector switch on the power supply is set incorrectly.
B. The 3.3v power line is connected to the wrong input on the motherboard.
C. The new power supply voltage rating is too high.
D. The 12v power cord is installed incorrectly.
单项选择题 A legacy PCI IDE controller card does not recognize a new IDE HDD. Which of the followingmaintenance techniques would BEST resolve this situation?（）
单项选择题 In order to ensure there is proper airflow in a new computer, which of the following should be performed?（）
单项选择题 A customer purchased a new PC with Windows XP but wants to run a program designed forWindows 98. Which of the following will allow this program to run under Windows XP?（）