论文部分内容阅读
在初中科学竞赛的培训中,对于同一道习题的变式探究在学生思维拓展的培养中起着至关重要的作用.对于同一道习题的变式探究,可以从习题的一题多解入手,可以从习题的归纳总结经验开始,也可以从习题的变式探究起航.接下来笔者就根据自身经验,以一道电学竞赛题为例进行变式探究,和大家交流探讨.图1原题.如图1所示的电路中,已知R1、R2、R3和R4的阻值分别是3Ω、9Ω、9Ω和3Ω,电源电
In the junior high school science competition training, the variant inquiry of the same exercise plays a crucial role in the cultivation of the student’s thinking development.For the same problem study, we can start from the one problem, Can learn from the experience of summing up the exercises began, but also from the exercise of the variant of exploration exercises. Next, the author based on their own experience to an electrical contest questions as an example to explore variants, and we exchange and discussion. In the circuit shown in FIG. 1, it is known that the resistances of R1, R2, R3 and R4 are respectively 3Ω, 9Ω, 9Ω and 3Ω. The power supply