题目

— Excuse me, may I use your dictionary? ________ is at home.— Certainly. But remember to return it on time.A.I B.Me C.Myself D.Mine 答案：【答案】D【解析】略一列快车正以216km/h的速度在平直的铁轨上行驶时，发现前面1500m处有一货车正以64.8km/h的速度匀速同向行驶，快车立即合上制动器，经120s的刹车时间才能停止，试判断两车是否发生撞车事故．