题目

Qian Xuesen was born in Shanghai on December 11th, 1911. He is known as “the father of China’s space program” and “The king of the rocket”. When he was 24 years old, Qian went to America for further study. After graduation, he worked in America for a few years, where his working conditions were better. In the early 1950s, he heard New China had been founded(成立) and decided not to stay in America any longer. He succeeded in coming back to his motherland in 1955 though the American government tried to stop him. In 1956, Qian Xuesen suggested setting up a special organizatio同步卫星在高空环绕地球飞行，其向心加速度用a1表示，该位置处由万有引力产生的加速度用g1表示；赤道表面物体跟随地球自转的向心加速度用a2表示，该位置处由万有引力产生的加速度用g2表示．已知同步卫星轨道半径是地球赤道半径的n倍，则g1：g2=1：n21：n2，a1：a2=n：1n：1．