题目

A. She has never been to Paris before. B. She knows a young man who could be helpfulC. She remembers very little about Paris. D. She would like to talk about it some other time. 答案：【答案】C【解析】此题为听力题，解析略。汽车紧急刹车后所受到的阻力的大小与汽车所受的重力的大小差不多，当汽车以20m/s的速度行驶时，突然制动，它还能继续滑行的距离约为A．40m B．20m C．10mD．5m