物质推断题是初中化学中较难的一种题型,能够全面考查学生化学知识的掌握情况.在近几年各省市的中考题中也频频出现,多数学生得分率较低,除了基础知识掌握的不熟外,主要还是由于学生的解题方法不对路.解这类题型的关键在于寻找突破口,然后顺藤摸瓜,进而完成全部未知物的推断. Material inference problem is a difficult problem in junior high school chemistry, to fully examine the students grasp of chemical knowledge in various provinces and cities in the test scores in recent years are also frequent, the majority of students score low, in addition to the basics to master Of the unfamiliar, mainly due to the students’ problem-solving method is not the right way to solve such questions is to find a breakthrough, and then follow the example, and then complete all the inferred unknown.