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huud4009
2 năm trước
Trong tinh thể các hạt (nguyên tử, phân từ, ion) A. dao động nhiệt xung quanh vị trí cân bằng. B. đứng yên tại những vị trí xác định. C. chuyển động hỗn độn không ngừng. D. chuyển động trên quỹ đạo tròn xung quanh một vị trí xác định.
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