A:物体所受摩擦力与推力是一对平衡力
B:物体的重力大于推力
C:物体所受摩擦力大于推力
D:推力和物体所受摩擦力大小关系不能确定
Wang Lei
How old is he?
1.
Where does he live?
2.
How far is it from his school?
3.
How does he get to school?
4.
Why did the whole school know him?
Because he got the first place in 5.
按要求填空。
伞共____画,第四画是____。