下列哪项是按实验研究的对象对教育实验进行分类的()
A.反应型实验
B.确认型实验
C.对照实验
D.前实验
正确答案是C
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Choose the closest paraphrased version after each of the following sentences or the italicized part. Blacken the letter corresponding to your choice on the answer sheet.
No one really expects a vacation trip to produce a close f
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