周公把商贵族微子启分封到宋，同时又在宋周围分封同姓诸侯。周公这样做的目的是（  ）

某校化学实验室废液桶中收集了溶解大量FeSO₄和CuSO₄（是重金属污染物之一）的废水，若直接排放到下水道既造成污染又造成浪费．某化学课外小组同学运用所学化学知识对废水进行处理，并回收硫酸亚铁晶体和铜，实验方案如下：

请回答：

①X是　____ 　，将其加入废水后发生反应的化学方程式为____ ；

②Y是　____ ，利用其除去固体中的杂质．

遗传学家把蕃茄的红果与黄果、兔的白毛与黑毛称为____，它们都是由____控制的．

    My name is Lucy and this is my grandfather．His name is Tim and he is my  best friend．My grandfather is 64 years old and he is retired now,so he has much time to be and play with me．I love him very much and I know he loves me too．

    He lives with me．my father,my mother and my brother Kevin．We live in a big house．My grandfather is a very tall and strong man!Can you see me on his shoulders (肩膀)in this picture?He is really strong!My grandfather always knows what l want to do or to eat or what I feel inside!When I am sad，he makes me laugh with his funny faces．Every night before I go to bed，my grandfather tells me stories，and he even sings for me!

根据材料内容选择最佳答案。