220-701单项选择题每日一练(2019.01.19)

单项选择题
A laser printer prints pages with a gray background. Which of the following is the MOST possible cause of the problem? （）
A.Transfer roller
B.Paper type
C.Print head
D.Fuser
单项选择题
Which of the following pin pairs remain with the same wire color for either T568A or T568B?（）
A. Pair 1 & 8
B. Pair 2 & 7
C. Pair 3 & 6
D. Pair 4 & 5
单项选择题
Which of the following interfaces are typically supported on the input side of a KVM switch?（）
A. PS/2, VGA, USB
B. DB25, DB9, PS/2
C. PS/2, DB9, USB
D. PS/2, DB25, VGA
单项选择题
A technician replaces a user’s 15 inch LCD with a 20 inch LCD. Later, the user informs thetechnician that icons are very large and the text on the monitor is fuzzy and distorted. Which of the following is MOST likely the cause?（）
A. The contrast setting needs to be raised from the default.
B. The monitor firmware was not updated.
C. The new monitor has a different native resolution.
D. The monitor needs to be degaussed to clarify the picture.
单项选择题
A technician is servicing a customer’s color laser printer and notices excess toner in the printer.Which of the following tools would BEST assist the technician in removing the excess toner?（）
A. Damp towel
B. Compressed air
C. Alcohol wipe
D. Computer vacuum