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nguyenminhson102002
2 năm trước
1. Một ô tô đang lăn bánh, cột điện bên đường, tài xế ngồi trong xe chuyển động hay đứng yên so với xe?Từ đó em rút ra được nhận xét gì? 2. a. Một đoàn tàu đang rời ga: đoàn tàu đang chuyển đông so với vật mốc nào, và đang đứng yên so với vật mốc nào? b. Một người đang đứng bên đường đang chuyển động so với vật mốc nào ,đang đứng yên so với vật mốc nào? c. Ba chở An đi học bằng xe máy,nếu chọn chiếc xe An đang ngồi và hàng cây bên đường làm vật mốc thì An chuyển động so với vật mốc nào và đứng yên so với vật mốc nào? Từ đó em rút ra nhận xét gì?
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