题目

Cortana, Alexa ,Siri ,These are names of robotic voices that are often programmed on electronic tablets. They also become default (默认) identities for people with speech disorders who rely on technology to communicate. Now some speech scientists are developing personalized voices to reflect the broader diversity of the people who use them. To do it, they are tapping into a vast network of volunteers who are donating their voices to share with people who can’t speak.The effort to build an international “Human Voicebank” has attracted more than 17,000 volunteers from 110 countries, incl1、下列说法正确的是（　　）A、根据质量守恒定律，1L氢气和1L氧气反应能生成2L水B、蜡烛完全燃烧后，蜡烛没有了，违背了质量守恒定律C、只有固体、液体间反应遵守质量守恒定律D、铁在氧气中燃烧，生成四氧化三铁的质量等于参加反应的铁丝与氧气质量之和