The Turners are American. They are now in Beijing. This is their first visit to China.

They are going to stay in China for three months.  They want to visit some big cities and villages. They hope to learn some Chinese, too.

Mr Turner is a driver. He likes to drive in Beijing. Mrs Turner is a school teacher. She is visiting a city school and a village school. Their daughter is a middle-school student. She meets some Chinese students.

They take a lot of pictures in China. When they are back in America, they are going to show the pictures to their friends. They want the American people to know more about China.

根据短文内容，回答下列问题。

小题1:Where are the Turners from?

小题2:What is Mr. Turner?

小题3:Is Mrs. Turner's daughter a middle-school student?

小题4:How many people are there in Mr. Turner's family?

小题5:Why do they take a lot of pictures in China?

相邻两边长的比值是黄金分割数的矩形，叫做黄金矩形，从外形看，它最具美感．现在想要制作一张“黄金矩形”的贺年卡，如果较长的一条边长等于20厘米，那么相邻一条边的边长等于______厘米．