题目

On a warm Monday．Jenny Neilson bought a sandwich and parked her car under some trees．Rolling down the windows to   1   in fresh air, she settled back to enjoy her lunch．Suddenly she   2   a big bald （秃顶的） man running through the parking lot．Before she came to   3   what would happen, the man was there, shouting through her window．Get out      Neilson   4  ．      Pulling open her floor, the man seized her   5   the neck and hair, and threw, her out of the car onto the ground．She screamed,   6   her purse and the keys．      Two reporte某同学在做平抛运动实验时得到了如图所示的物体运动轨迹，A、B、C三点的位置在运动轨迹上已标出（g取10m/s2），则：(1)小球平抛的初速度为________m/s.(2)小球在B点瞬时速度vB=________m/s.(3)小球开始做平抛运动的位置坐标为：x=________cm，y=________cm.