近年来，在各级各类的生物考试中，有些试题由于命题者的巧妙设置，使解题条件隐蔽而抽象，往往使学生的思维发生障碍。如果根据试题中所给条件将思维进行合理的转换，使隐蔽条件明朗化、抽象条件具体化、复杂问题简单化，将大大提高解题速度。举例说明如下。1、“媒介”转换有 In recent years, in various types of biological examinations at various levels, some questions have been subtly set due to the propositional person’s clever settings, which makes the problem-solving conditions hidden and abstract, which often makes the students’ thinking obstacles. If the reasonable conversion of thinking is carried out according to the conditions given in the test questions, so that the concealed conditions become clear, the abstract conditions are concretized, and the complex problems are simplified, the problem solving speed will be greatly improved. Examples are as follows. 1, “media” conversion