---Isn’t it a surprise that I happened to meet Francis Mathews at the Christmas Party last week? ---If my memory serves me correctly, you _____ each other for exactly two years. A. hadn’t seen B. haven’t seen C. didn’t see D. don’t see 答案:A关于平抛运动,下列说法正确的是( )A.飞行时间由初速度和高度决定B.水平位移由初速度和高度决定C.速度和加速度都是在变化的D.属于匀变速曲线运动