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haothuylinh
2 năm trước
A. Khi vật này..........vật kia, ta nói vật này........lên vật kia. - ví dụ: B. Mỗi lực có một........ Xác định. C. Hai lực cân bằng là hai lực............., có cùng.............trên một đường thẳng. - ví dụ: D. Một vật đang.......nếu chịu tác dụng của........... ........ Thì vật đứng yên.
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