控制实验法的“控制”具体表现为控制
A.实验者
B.实验观察
C.自变量
D.实验环境
E.实验对象
正确答案是CDE
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上一篇:“Life is but a losing battle, it is a struggle man can dominate in such a way that loss becomes dignity;man can be physically destroyed but never defeated spiritually.” This notion is typically held by ______.
“Life is but a losing battle, it is a struggle man can dominate in such a way that loss becomes dignity;man can be physically destroyed but never defeated spiritually.” This notion is typically held by ______.