高中课本(试用本)第一册第158页[实验6—5],照课夺上做法,现象很不明显,我们做了如下的改进,达到了良好的效果。现简介如下。一、实验方法及步骤 1.课的预备两只充满二氧化氮和四氧化二氮的混合气体的具支试管(20×200mm),把其中一只支管跟注射器(50ml)照图1所示联结起来(注意检查气密性)。另一支管作为实验对比的参照物。 In high school textbooks (trial papers), volume 1, page 158 [Experiment 6-5], according to the lesson, the phenomenon is not obvious. We have made the following improvements and achieved good results. The brief introduction is as follows. First, experimental methods and steps 1. Preparation of the lesson Two test tubes (20 x 200 mm) filled with a mixture of nitrogen dioxide and nitrogen tetraoxide, and one of the branches and a syringe (50 ml) is shown in Figure 1. Join together (note the air tightness). The other tube serves as a reference for experimental comparisons.