单选题（）is a technique used for illumination behind the liquid crystal display that makes LCDs easier to read.AFrontlightBBackup PowerCCathode ray tubeDBacklight
单选题
（）is a technique used for illumination behind the liquid crystal display that makes LCDs easier to read.
A
Frontlight
B
Backup Power
C
Cathode ray tube
D
Backlight
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