题目

听下面一段较长对话，回答以下小题。【1】What is the woman doing?A. Seeing a doctor. B. Doing a survey. C. Asking for advice.【2】How does the man keep fit?A. By doing different sports. B. By eating a healthy diet. C. By cycling to work. 答案：【答案】【1】 B 【2】 C 【解析】【1】此题为听力题，解析略。【2】此题为听力题，解析略。我国著名数学家华罗庚曾说过：“数形结合百般好，隔裂分家万事非．”如图，在一个边长为1的正方形纸版上，依次贴上面积为，，…，的矩形彩色纸片（n为大于1的整数）．请你用“数形结合”的思想，依数形变化的规律，计算+++…+=________．