ThomasEdison'sincandescent(白炽的)light-bulbwillhavebeenb...
问题详情： ThomasEdison'sincandescent(白炽的)light-bulbwillhavebeenbroughttoanendby2016becauseitusestoomuchenergy.The"greatlighthope"toreplaceitisabulbmadefromlight-emittingdiodes(两级管),orLEDs.Mor...
问题详情： ThomasEdison'sincandescent(白炽的)light-bulbwillhavebeenbroughttoanendby2016becauseitusestoomuchenergy.The"greatlighthope"toreplaceitisabulbmadefromlight-emittingdiodes(两级管),orLEDs.Mor...