（引言第一、二章内容）引言１.物理学研究的范围　　２.研究物理问题最根本的方法例某同学用毫米刻度尺测一物长，测量结果为１．４１厘米、１．５２厘米、１．４２厘米、１．４４厘米，其中有错误的是，物体长（一般指平均值或最接近真实长度的值）为厘米．完善与提高１．用 (Introduction to the first and second chapters) Introduction 1. The scope of physics research 2. The most fundamental method for studying physical problems Example A student measured a length with a millimeter scale, and the measurement result was 1.41 cm and 1.52 cm. , 1.42 centimeters, 1.44 centimeters, in which there is an error, the object is long (usually the average value or the value closest to the true length) is centimeters. Improve and improve 1. use