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chaucuho7
2 năm trước
Câu 10: Hãy chọn câu lập luận đúng trong các câu dưới đây: A. Một con tàu vũ trụ bay quanh Trái Đất thì không bị Trái Đất hút nữa. Vì nếu bị hút thì nó đã rơi ngay xuống Trái Đất. B. Một con tàu vũ tru bay quanh Trái Đất thì không bị Trái Đất hút.Vì ta thấy nhà du hành vũ trụ bị lơ lửng trong con tàu. C. Một con tàu vũ trụ bay quanh Trái Đất vẫn bị Trái Đất hút. Nhưng lực hút này bi cân bằng bởi lực đẩy của động cơ. D. Mặt trăng luôn luôn bị Trái Đất hút. Nhưng Mặt Trăng không bị rơi vào Trái Đất, vì lực hút có tác dụng làm Mặt Trăng quay tròn quanh Trái Đất.
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