I w____ to Qingdao with my parents last summer holiday. We t____a plane there. We went to the beach. It was very b ____. I like swimming very much. I s____in the sea. My mum took many p____ there. We had a good time.
(1)人类的生活离不开金属材料.生活中某些食品包装内放一小包铁粉,作用是什么?
(2)某同学在探究铝与稀盐酸的反应时,发现打磨过的铝片反应比未打磨过的铝片反应剧烈,请解释原因可能是什么?
(3)将一定量的锌粉加入到氯化亚铁和氯化铜的混合溶液中,充分反应后过滤,向滤渣中加入稀盐酸,无气泡产生.请分析滤液中所含溶质情况?
比一比。
土____、王____
力____、刀____