汽车以10m/s的速度在一平直公路上匀速行驶,突然遇到特殊情况刹车,已知刹车过程中汽车做匀变速直线运动,且加速度大小为2m/s2,若从开始刹车计时
Do you like table tennis? ____
极坐标方程ρ=11-sinθ所表示的图形是( )
—Who can help me carry the heavy box?
—I think David is _______ to do it. But the door is ______for him to go through.