题目

Dear Mr. Know, My 13-year-old son was hurt in an accident several days ago. His doctors say he has no chance of seeing again. I have no experience with the blind(盲的). I want to know how he may behave in the future. I want to know everything I can to help him. Please help!                                                  Mary Dear Marry,      My son, Trey, who is nine years old, also lost his vision(视力)suddenly. I think one of the most important things for you to do is to find other blind kids of your son’s age in your area. 一辆轿车行驶的速度是100km／h，一辆自行车前进的速度是5m／s，这表明(     ) A．轿车行驶的路程一定比自行车多           B．轿车一定始终在自行车前面 C．自行车的运动时间一定比轿车长           D．轿车的运动一定比自行车快