life-size and incredibly life-like while lighting up any space they're in with brilliant colors and shimmering reflections. Hundreds of individual LED bulbs complete the display. Perfect for city parks, walking paths, commercial properties, shopping malls, Christmas light tours, big box stores, spe...
He then built a much【8】windmill than usual with old pieces of junk.The villagers were amazed when they saw he used it to power four light bulbs and to charge(使充电) their mobile phones !William's windmill drew a lot of【9】and he even wrote a book about his story.Now he travels...
Christmas soon arrived. The minute I saw the look on my dad's face as he unwrapped those swirling black letters carefully placed in a cheap frame,I knew I had given the perfect gift. 1. The idea for a special gift began to form when the author was ___. A.doing...
Artificial light sources have been developed in the order of incandescent and halogen bulbs that emit light by heat, HID (high-intensity discharge) lamps that emit light by exciting gas, LED (light-emitting diode), and LD (laser diode) applied with semiconductor lighting technology. ...