最近读本刊 2 0 0 2年第 5期 ,对《气体体积增大 ,一定对外做功吗 ?》一文感受颇深 ,笔者在中学物理教学近 1 0年中 ,也形成了这类问题的思维定势 .而且现在的许多资料对此类问题也存在认识上的错误 .这里有必要对该问题作进一步的澄清和完善 ,以供广大教师教学参考 .1　正确区 In the recent issue of the second issue of the 2002 issue of the book, did I have a deep understanding of the article “Does the volume of gas increase, does it work externally?” The author has also formed the thinking of this kind of problem in the middle school physics teaching for nearly 10 years. Fixed position. And now many of the information on this type of problem is also a mistake in understanding. There is a need for further clarification and improvement of this issue, for the majority of teachers teaching reference. 1 correct area