现行的教材中对利用启普发生器装置制备气体已降低难度或不做要求,但利用启普发生器原理来制备气体的实验却在每年中考中都会出现。由于同学们没有接触过启普发生器,或即使接触过也不理解其原理,因而对该类考题根本无法入手,据此,本文将启普发生器的结构、原理、使用条件结合近几年的中考化学试题举例分析如下,望对同学们有所裨益。 In the current teaching materials, the use of the Kepler generator device to reduce the gas preparation has been reduced or not required, but experiments using the principle of the Kepler generator to prepare gas are present in the annual examination. Because the students did not come into contact with the Kepler generator, or did not understand the principle even if they had contact with them, the questions could not be started. According to this, this paper combines the structure, principle, and conditions of use of the Kepler generator. An example analysis of the chemistry test questions in the middle school entrance examination is as follows. It is hoped that the students will benefit from this.