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高中生物实验研究性教学往往要通过让学生掌握对一般性问题的研究的方法与技巧,来培养学生探究问题的能力.在对一般性问题的研究中,要根据实验目的设置科学合理的对照实验.但问题往往是复杂多变的,特别是含有两个实验目的不同条件要求的问题,由于要控制两个实验变量,对照实验的设置要求就比较高,就要更加注重对照实验的设置技巧,才能在复杂多变的条件下来研究相关问题.Ⅰ.两个实验目的,两个实验变量可以同步设置
The high school biology experimental research teaching often tries to cultivate students’ abilities to explore the problem by grasping the methods and skills of the students to study the general problems.In the research of the general problems, we should set the scientific and reasonable control experiment according to the experimental purpose However, the problems are often complicated and changeable, especially the problems that contain the requirements of different conditions for two experiments. Since the two experimental variables are to be controlled, the requirements for the setting of the comparative experiments are relatively high, more attention should be paid to the setting skills of the control experiments, In order to study the relevant issues under complex and changeable conditions.Ⅰ.For two experimental purposes, two experimental variables can be set simultaneously