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The thickness of the second volume of the seventh grade math book
1 cm.

According to relevant data, the thickness of a book is about 1cm.

Mathematics is a book published by Beijing Jiaotong University Press from June 5, 2006 to 2006 10, by Tan Jiefeng. One of the three-dimensional series textbooks of planning mathematics in higher vocational colleges is the elementary mathematics part of mathematics in five-year higher vocational colleges and secondary vocational schools.