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学生做完一道习题,特别是有代表性的综合习题后,并非能完全达到练题的目的。在习题教学中,还需要采取适当的方法引导学生评析,以进一步巩固练题成果,提高解题能力。本文举例谈谈习题练后的几种评析方法。 一、对比法 练题后,引导学生将形同实异,形异实同,概念易混的习题放在一起,进行辨析比较,以提高审题分析能力,克服思维定势的弊端。 1.形同实异的对比 [例1]:组成烟草、烟草花叶病毒、噬菌体三种生物的核酸的核苷酸种类数分别是:……………………………………………（） （A）4,4,4（B）8,4,4 （C）5,4,4（D）8,4,5 很多同学错误地选择了（C）。 笔者没有多说,仅据此另出一题作对比:
After a student finishes an exercise, especially a representative comprehensive exercise, it is not possible to fully achieve the purpose of the exercise. In the exercise of the exercises, it is also necessary to take appropriate methods to guide students in their assessment so as to further consolidate the results of the exercises and improve the ability to solve problems. This article gives an example of several evaluation methods after practice exercises. First, the contrast method After the problem, guide the students to be similar in shape, shape and reality, the concept of confuse the exercise together, to analyze and compare, in order to improve the ability to analyze problems, overcome the disadvantages of thinking fixed. 1. Comparison of similarities [Example 1]: The number of nucleotide species of nucleic acids that make up the three organisms of tobacco, tobacco mosaic virus, and bacteriophage are: .......................................... .........() (A)4,4,4(B)8,4,4 (C)5,4,4(D)8,4,5 Many students mistakenly chose (C). The author didn’t say much more. Only one more question was compared for this purpose: