题目

Mr．Smith told us that    gold medal his son had got was considered     honor to the whole family．    A．the：/       B．the；an       C．a；an     D．a；the   答案：B9．一块500g的冰放入一容器中，熔化成水后，它的质量不变，密度变大，体积变小（前三空选填“变大”、“变小”或“不变”）．