7.如图所示的演示实验中是将接触面被削平的两个铅块用力压紧可以使它们结合在一起即便在下端悬挂一定质量的重物铅块也不分开.此现象说明分子 Template




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tomski7.如图所示的演示实验中是将接触面被削平的两个铅块用力压紧可以使它们结合在一起即便在下端悬挂一定质量的重物铅块也不分开.此现象说明分子 coloring