【简答题】Sally just _________ in a new music class. It starts next month.
【单选题】Sally just _________ in a new music class. It starts next month.
【简答题】燃烧时产生蓝紫色火焰的是( ) A.木炭在氧气中燃烧 B.硫在氧气中燃烧 C.磷在空气中燃烧 D.铁在氧气中燃烧
【简答题】比较木炭在空气中和在氧气中的燃烧现象:木炭在空气中燃烧的现象是____;木炭在氧气里燃烧的现象是____。讨论:木炭分别在空气和氧气中燃烧的现象不同,说明了____。
【简答题】Sally just _________ in a new music class. it starts next month.
【简答题】硫在空气中燃烧时,产生______火焰,在氧气中燃烧时产生______火焰,铁丝在氧气中燃烧时的现象是______.
【单选题】Sally just _________ in a new music class. It starts next month.
【单选题】My father’s brother is my _________.