来自罗小武的问题
物理长度的测量0.8um____mm=___nm9x10^4m=___km=___um70mm=___m=___cm1.3x10^5m=___mm=___nm2.18.45cm所用刻度尺分度值___3.3.24cm分度值___50.6m分度值___3.25m分度值6.476的又是
物理长度的测量
0.8um____mm=___nm
9x10^4m=___km=___um
70mm=___m=___cm
1.3x10^5m=___mm=___nm
2.18.45cm所用刻度尺分度值___
3.3.24cm分度值___50.6m分度值___3.25m分度值6.476的又是
