单项选择题
A. Faulty driver; reinstall or update driver
B. Bad fuser; place service call to printer manufacturer.
C. Excess toner on drum; perform maintenance (e.g. clean drum surface).
D. Deteriorating rollers and worn brushes; replace rollers and brushes.
单项选择题 Which of the following CPUs would fit into an AM2 socket?（）
单项选择题 After receiving a message at startup stating that ‘One or more services failed to load at startup’,which of the following Windows utilities would a technician use to diagnose the issue?（）
单项选择题 A user is reporting that they are getting pop-ups while they are not actively browsing the Internet.Which of the following would BEST resolve this issue?（）