模式；科学探究；主题；化学实验教学。
Pattern; Science inquisition; Subject; Chemical experiment teaching.
选好切合实际的主题，是一节探究活动课的首要问题。
Chooses the realistic subject, is inquires into the active class the most important question.
选好切合实际的主题，是一节探究活动课的首要问题。
Chooses the realistic subject, is inquires into the active class the most important question.
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