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本部分习题是对人教版《数学》七年级下册第九章各节课后习题的补充．这些题目大都是本文作者依据中考题精心改编而成的,可作为同学们课外练习及教师布置作业之用,同学们不妨一试．
This part of the exercise is to supplement the post-lesson exercises of Chapter 9 of the seventh edition of Mathematics for People. Most of these topics are carefully edited by the author based on the exam questions, and can be used as extra-curricular exercises for students and assignments for teachers. Students may wish to try.