测量是最简单而又最重要的实验基础．在“测量的初步知识”中，主要介绍了“长度”的测量．这一章内容看似简单，实际内容却很丰富，学好这一章对物理实验是很重要的．一、应掌握的几个概念１．测量值对某物理量测得量的结果，它包括准确值、估计值和单位三部分．２．真实值某 Measurement is the simplest and most important experimental basis. In the “preliminary knowledge of measurement”, the measurement of “length” is mainly introduced. The content of this chapter seems simple, but the actual content is very rich. It is very important for the physics experiment to learn this chapter. First, a few concepts that should be mastered 1. Measured value The result of the measured quantity of a physical quantity, which includes three parts: exact value, estimated value, and unit. 2. A real value