Which of the following would be the maximum number of devices in a single chain that USB technology will allow？（）

WhichofthefollowingdesktophardwareshouldatechnicianbeMOSTconcernedwithdisposingofcorrectly？（）

A.batteries
B.power cords
C.disk drives
D.hard drives

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Duringbootup，alaptopscreendisplaysverticalcoloredlinesandthentheLCDscreengoesblank.Therearenodisplayproblemswhenconnectedtoanexternalmonitor.Whichofthefollowingactionsshouldbetakentoresolvetheproblem？（）

A.Replace the laptop.
B.Replace the LCD screen.
C.Replace the LCD pixels.
D.Re-select the LCD in Device Manager.

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