设计对照实验时，应遵循的原则是_刷题宝

题干

设计对照实验时，应遵循的原则是（）

A：除实验变量外，其他变量都相同

B：所有变量都相同

C：所有变量都不相同

D：除实验变量外，其他变量都不相同

上一题下一题 0.0难度选择题更新时间:2019-06-27 07:09:30

答案(点此获取答案解析）

A

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