一、原题呈现人教版数学实验教科书九年级下册(2009年3月第2版,2009年8月浙江第4次印刷)第87页例3,是一道以“神舟”5号载人飞船发射成功为背景的应用题,内容如下:例3 2003年10月15日“神舟”5号载人航天飞船发射成功.当飞船完成变轨后,就在离地球表面350km的圆形轨道上运行.如图28.2-5,当飞船运行到地球表面上P点的 I. The original title presents the second edition of the mathematics experiment textbook of the People’s Education Press (the second edition in March 2009, the fourth printing of Zhejiang in August 2009). Page 87 Example 3 is a “Shenzhou” No. 5 The application of a successful launch of a manned spacecraft is as follows: Example 3 The “Shenzhou” 5 manned spacecraft was successfully launched on October 15, 2003. When the spacecraft completed its orbit, it was 350km away from the surface of the Earth. Run on a circular orbit. As shown in Fig. 28.2-5, when the spacecraft travels to point P on the surface of the Earth