在“研究平抛物体的运动”的实验中记录的一段轨迹.已知物体是从原点O水平抛出,经测量C点的坐标为(60,45).则平抛物体的初速度v0=____m/s,该物体运动的轨迹为一抛物线,其轨迹方程为____.
句子配对。
①How heavy is Tom?____ A. There are 15.
②How old is he?____B. He is 15years old.
③How much is the robot?____C. He weighs 51kg.
④How many boys are there under the tree?____D. It's September 15th.
⑤When is your birthday?____E. It's ¥15.