Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
下面的文本有一些空格。点击每个空格会出现一组选项，请为每个空格选出最合适的答案。
The logic of the scientific method was set out by John Stuart Mill in 1843 and was named the method of difference. A simple example of what he meant by this is to take two glasses of water which are in every respect. Introduce a few drops of ink into one of these glasses. The water changes color! According to Mills method of difference it is safe to assume that the change in the color of the water is due to the of a new factor—the variable—in this case, the ink.
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