众所周知,自从吉林省高中化学新课程改革以来,我省普遍从高中化学人教版选修教材中选择选修Ⅲ(物质结构与性质)或选修Ⅴ(有机化学基础)中的一本来讲(有的学校的实验班的老师可能会选择两本都讲)。而关于具体哪一本更适合高考,不同的老师和学生也是见仁见智。经过这近十年的高考题来看,两道选做题的难易不是绝对的,很难把握,而学生和老师共同认为:选修Ⅲ得分比较快,但是得满分比较困难(往往在最后一个求密度的问 As we all know, since the reform of the new high school chemistry curriculum in Jilin Province, the province has generally selected one of the electives III (material structure and nature) or elective V (organic chemistry basis) from the textbooks for high school chemistry education personnel to teach (some schools). The teacher of the experimental class may choose to speak both. As for which specific book is more suitable for the college entrance examination, different teachers and students are also opinionated. After nearly 10 years of college entrance examination questions, the difficulty in choosing between two questions is not absolute, it is difficult to grasp, and the students and teachers together think: Elections III score faster, but it is more difficult to get full marks (often the last one Ask for density