设计性实验题是历年高考的热点,也是难点.它的设计源于教材,高于教材,一般含有课本中学生实验的影子,经创新设问、缜密改编而成,求解这类试题要求学生从方法上进行迁移,运用所提供的器材创造性地进行实验设计.那么,此类实验题的设计思路应如何打开呢?“紧扣原理、比较异同、突破迁移”是一种重要思路. Design experiment is the hot topic in the entrance examination over the years, but also difficult.It’s design from the textbooks, higher than the textbook, the textbooks generally contain the shadow of high school students experiment, innovative design, meticulously adapted to solve such questions requires students from the method On the migration, the use of the equipment provided by the experimental design of creativity, then the design of such experiments should be how to open it? “Close principle, more similarities and differences, to break through the transition ” is an important idea.