問題虽然是发生在师大同学的实习課中,但对于中学老师們来說,也不无研究的意义。因此,写出来和中学的老师們商榷,并希予以指正。一、关于設x(或y)代表什么数的問題 有些实习生在教学这一課題时說:“对某些应用問題只能用x(或y)代表另外的未知数,从而間接地求得題中所要求的未知数。对这样的問題根本不能设x(或y)直接代表题中所要求的未知数而解出。”这种說法是不对的。根本沒有不能用x直接代表題中所要求的 Although the problem occurred in the practising class of the students in the teachers’ college, it was not without significance for the teachers in the middle school. Therefore, write up and discuss with the teachers of the middle school, and hope to correct it. First, on the question of what number x (or y) stands for Some interns say in teaching this topic: “Only for certain application problems can only use x (or y) to represent another unknown number, so indirectly to obtain the title The unknowns required in the answer to such a question cannot be set at all by the x (or y) directly representing the unknowns required in the question.” This argument is wrong. There is simply no way to use x directly to represent what is required in the question