题目

Travel Unaccompanied Now many young people are traveling around the world on their own, not because they have no one to travel with, but because they prefer to go alone. Kristina Wegscheider from California first traveled alone when she was at college and believes that it is something everyone should do at least once in their life. “It opens up your mind to new things and pushes you out of your comfort zone.” Wegscheider has visited 46 countries covering all seven continents. In foreign countries, with no one to help you read a map, look after you if you get ill, or lend you money if 如图，动点从出发，沿所示方向运动，每当碰到矩形的边时反弹，反弹时反射角等于入射角，当点第次碰到矩形的边时，点的坐标为（ ）A. (0,?3) B. (5,?0) C. (1,?4) D. (8,?3)