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在高三毕业班生物复习教学中，加强试题的练习与讲评是很有必要的。如有许多学校提出“四精四必”原则，“四精”为：精备、精选、精练、精讲；“四必”为：有发必收、有收必改、有改必评、有评必纠。这对提高复习效率的确大有帮助，但常易导致学生整天钻在题海中，课业负担偏?
It is necessary to strengthen the practice and comment of the examination questions in the biology review class of the third year graduation class. If there are many schools that put forward the principle of “four essentials and four musts,” the “four fines” are: fine preparation, selection, refinement, and precision; “four musts” are: There must be income, there must be income, and there must be change. There must be criticism. This is indeed helpful to improve the review efficiency, but often leads students to drill in the sea all day, and the burden of school work is biased.