物理学是一门以实验为基础的自然科学,作为实验重要组成部分的仪器的科学读数和记录,是一种重要的素质要求.广义上说,一切测量结果都是近似的,而近似值应当用有效数字来表示(测量中把带有一位不可靠数字的近似数字,叫做有效数字).按照规定,有效数字只保留一位不可靠的数字,其最后一位数字是有误差的.因此,仪器的读数误差出现在哪一位,读数就读到那一位止.在实际操作中,究竟估读到哪一位数字,应 Physics is an experiment-based science that is an important qualitative requirement for scientific readings and recordings of instruments as an important part of an experiment. Broadly speaking, all measurements are approximate and approximations should be used The number of significant digits (the approximate number with an unreliable number in the measurement, called the effective number) .According to the regulations, the effective number of only keep an unreliable figure, the last digit is an error.Therefore, the instrument Of the reading error appears in which one, the reading is read only in that one. In practice, what exactly read a figure should be