单词	nitrousness
释义	请查阅词条：nitrous
随便看	halfpence halfpennies halfpenny halfpennyworth half-pie half-pike half-pint half-pints halfpipe half-pipe half plate half-pounder half price half-price half-rater half relief half rest half-round half-seal half seas over half-seas-over half-shell half-shirt half-shot half-sister 煤分为哪几类？煤是从哪里来的? 煤是在什么时候形成的？又是怎样形成的？煤气为什么会使人中毒煤气是从哪里来的煤气泄漏为什么会引发爆炸煤气灯是什么时候发明的？煤炭是怎样形成的? 煤能变成汽油吗煤能成为清洁的能源吗 fotokopieren Fotokopierer Fotokopiergerät Fotokopiermaschine fotokopiert Fotolithographie Fotometer Fotomodus Foton Fotopapier