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“质量守恒定律”是初中化学教学中的一条重要规律,是初中学生首次通过定量的研究手段来对化学反应进行研究的知识,此知识将贯穿学生学习化学的始
“The law of conservation of mass” is an important law in junior high school chemistry teaching. It is the first time that junior middle school students study the chemical reaction through quantitative research means. This knowledge will run through the beginning of students’ learning chemistry.