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第5节误差和有效数字 实验：长度的测量,测量值,真实值,仪器本身不精密,实验方法粗略,实验原理不完善,校准仪器,对读数作修正,改进实验方法,设计出在原理上更完善的实验,实验者,测量仪器,被测物理量,多次测量,|AA0|,估读数,非零数字,估读数,无关,微小差值,3读数：如下表所示,9,0.1,0.1,0.1n,19,0.05,0.05,0.05n,49,0.02,0.02,0.02n,104.05,40.55,2.667(2.6652.669均正确),图1 图2,50.15,3.2053.208,外径,内径,深度,49,0.02 mm,5.212,6.125(6.1236.127都算对),CD,2.793(2.7912.795均可),可动刻度分为100等分,16.98,24.60,B,0.05,1.25,
