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实验是生物高考中的一个重点,而对照组和实验组的判断是其中的一个难点,我们应该在明确4个变量,即自变量、因变量、无关变量、额外变量基础上确定实验的设计方法(添加法,排除法),最后根据判断原则,即添加法实验中有自变量的一组是实验组,排除法实验中无自变量的一组是实验组来进行判断。
The experiment is a key point in biology college entrance examination, and the judgments of the control group and the experimental group are one of the difficulties. We should determine the experimental design method based on the four variables (independent variables, dependent variables, irrelevant variables and extra variables) (Addition method, exclusion method). Finally, according to the principle of judgment, one group with independent variables in the experiment of adding method is the experimental group, and one group with no independent variable in the experiment of excluding methods is the experimental group.