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帮助学生正确认识和运用物理量的正负,对于学好物理知识具有重要的关系.本文拟就中学物理量的正负谈几点浅见.
Helping students to correctly understand and use the positive and negative values of physical quantity is of great importance for the study of physical knowledge. This article intends to discuss the positive and negative aspects of physical quantity in secondary schools.