A:取样,滴加硫氰化钾溶液
B:取样,加氯水和CCl4,振荡、静置
C:取样,加足量盐酸加热,用湿润的品红试纸检验气体
D:取样,加足量的NaOH浓溶液,加热,用湿润的红色石蕊试纸检验气体
根据句意及所给提示完成句子
Our teacher is ____(像)our parents.
They are waiting for you at the bus s____.
There are 2,000 v____ in the village.
I often get up at h____ past six in the morning.
— What colour is the tree?
— It's _________.
鸟类有适应飞翔的特征:身体大多是____,前肢变成翼,体表被覆____.