多选题 Lewis Latimer"s inexpensive method of producing carbon filaments ______ the nascent electric industry by making electric lamps commercially ______.
【正确答案】 B、E
【答案解析】[解析] ●retard减速,transform改变,provoke激起。答案选B。
●unfledged无经验的,viable可行的,prohibitive禁止的。答案选E。