“精讲多练”这是化学教学中的一个原则。但是,多练并不等于使学生陷入题海之中而不能自拔。多练的目的是要使学生在练习中不断对所学过的化学原理及知识加以深刻理解,消化、记忆。而且要上升到具有一定地运用所学过的知识对遇到的各类问题予以分析、推理和解答的能力。因此;对多练所选编题目的质量高低,无疑是教学成败中的一个重要环节。下面我就高一教材中,关于《摩尔》及《气体摩尔体积》两节教学后,所选编的习 “Lean and practice more” This is a principle in chemistry teaching. However, more practice does not mean that students are trapped in the sea and cannot extricate themselves. The purpose of much practice is to enable students to continuously understand, digest, and remember the chemistry principles and knowledge they have learned in practice. And it must rise to the ability to analyze, reason, and answer all types of problems encountered by using certain knowledge. Therefore, the level of quality of selected and edited topics is undoubtedly an important part of the success or failure of teaching. In the following, I will use the textbooks listed in the first two textbooks on Moore and Gas Molar Volume.