A. traditional lighting is less durable and dearer
B. a laser excited the quantum dots C. America adopted
LEDS D. graduate students work hard E. quantum
dot mixtures are magic F. it is more efficient
填空题
Unlike traditional lighting, LEDs do not give out heat so ______.
填空题
Edison's bright invention is likely to be outdated because ______.
填空题
Something unexpected happened during Bower's experiment when ______.
填空题
Over one quarter of energy consumption for lighting could be saved by 2025 if ______.