杠杆平衡条件探究过程中的两次平衡操作与用天平测量物体质量时两次平衡的调节异曲同工,应重视它们的连锁教学。尤其要把握住杠杆平衡条件表达式中的四个物理量是针对第二次平衡立竿的,把握住这一“基准”对解析2016年两道中考物理试题有立竿见影的效果。 Leverage balance conditions to explore the process of balancing the two operations and balance the quality of the object when the two balance adjustment similar to the same, should pay attention to their chain teaching. In particular, it is necessary to grasp the balance of the lever balance of the four physical quantities in the second balance for a pole, to grasp the “benchmark” to resolve the 2016 two middle school physics exam has immediate effect.