如图所示三个容器，底面积相等，若都装入相同质量的酒精，则酒精对容器底部的压强（    ）

某溶液可能含有Cl^﹣、SO₄^2﹣、CO₃^2﹣、HCO₃^﹣、NH₄⁺、Fe³⁺、Ba²⁺和K⁺，取该溶液100mL，加入过量NaOH溶液加热，得到0.02mol气体，同时产生1.97g白色沉淀；向上述滤液中加足量BaCl₂溶液，也得到1.97g沉淀．由此可知原溶液中（　　）

     Don't throw away some old things．We can____them．We can put our pens and pencils in____．They will be nice____．We can put flowers in some bottles；they will be nice____．We can stick some____together and put our cards in them．How interesting!