单项选择题
A. The laptop is not turned off
B. The power cable is not unplugged
C. The lock button is set to lock
D. The ACPI settings are configured improperly
单项选择题 A user is printing pictures to the color laser printer and the bottom half of the picture is faded. The printer is displaying no errors. Which of the following is the MOST likely resolution to the problem?（）
单项选择题 A user reports that the laser printer is constantly jamming on humid days. Which of the following is the MOST likely resolution to the problem?（）
单项选择题 When setting up a new small office home office (SOHO) wireless network, which of the following is MOST likely to be the default wireless channel?（）