A、B、C、D为四种可溶性的盐，它们的阳离子分别可能是Ba2+、Ag+、Na+、Cu2+中的某一种，阴离子分别可能是NO3﹣、SO42﹣、Cl﹣、CO32﹣的中的一种．
①若把四种盐分别溶解于盛有蒸馏水的四支试管中，只有C盐的溶液呈蓝色．
②若向①的四支试管中分别加入盐酸，B盐的溶液有沉淀生成，D盐的溶液有无色无味的气体逸出．
根据①②实验事实可推断它们的化学式为：
呼吸道不仅能保证气体顺畅通过，还能对吸入的气体进行处理．下列对呼吸道结构和功能的叙述，错误的是（ ）
Mike eats breakfast five times a week . He doesn't eat breakfast on Saturday and Sunday . He washes the dishes twice a week . He washes them on Saturday and Sunday . He waters the plants four times a week . He doesn't water them on Monday , Wednesday and Friday . He always sets the table . He sets the table from Sunday to Saturday . He washes his dog once a week . He washes it only on Saturday . He goes swimming twelve times a month . He swims on Monday , Wednesday and Friday . But he never cleans his room .
药物自口腔到达小肠，中间需经过消化道的哪些器官？ ____ 。（列举两个）
