题目

 More people all over the world get to know Shanghai after the EXPO.The Smiths are Canadian tourists.They are visiting Shanghai.It's their first visit to China.They're staying in China for about 2 months.They want to visit some other big cities and villages.They hope to learn some Chinese，too.Mr Smith is a taxi driver.He likes to drive in Shanghai.Mrs Smith is a school teacher.She is visiting a city school and a village school next week.Their daughter is a middle school student.She is going to meet some Chinese students.They are taking a lot of photos in China.When they get back to Canada图中最小面的面积是最大面面积的 ，它的棱长总和 ，体积是 ，用两个这样的长方体拼成一个大长方体，表面积最多减少 ，最少减少 ．