一架玩具飞机的价格上涨，不会涨到一架飞机的价格；一架飞机的价格下跌，也不会跌到一架玩具飞机的价格。这说明（    ）

①价值决定价格                   ②价格不会背离价值太远

③商品的影响决定价格             ④商品的使用价值决定价格

C

    My family lives in London. In the morning, my father goes to work and we go to school. My father takes us to school every day. My mother stays at home. She does the housework. She always has lunch at home, and visits her friends in the afternoon. In the afternoon, we go home from school by bus. My father gets home from work late. At night my two brothers and I always do our homework. We go to bed at about ten. My father and my mother usually read newspapers. We can watch TV at the weekend.

用光的透明程度来划分物体，可以分为____、____、____三种。