A:
B:
C:
如图所示,光滑的水平面上,小球m在拉力F作用下做匀速圆周运动,若小球到达P点时F突然发生变化,下列关于小球运动的说法正确的是( )
sè
yīn
ɡāi
吝____
绿____如盖
言简意____
_______ Lily _______ Sam likes popular songs, so they went to Lin Feng's concert together last night.