试论化学命题的原则陕西师范大学附中特级教师屈直论述命题应该是有原则的。对于化学试题的命题，笔者从自己３０多年教学实践中体会到，应遵循以下几方面原则。１．科学性原则科学性原则首先是指试题和练习题必须做到在所涉及的知识方面，科学性是正确的和准确的。其次，... On the Principles of Chemical Propositions Qu Shi’s special teacher in the secondary school of Shaanxi Normal University should be principled. For the propositions of chemical test questions, the author learned from his own 30 years of teaching practice that the following principles should be followed. 1. Scientific Principles The scientific principles first means that test questions and practice questions must be done in terms of the knowledge involved, and scientificity is correct and accurate. Second,...