正版 A高等数学习题全解指南（上册）同济第七版同济大学数学系大教材教辅 大学教材书籍9787040396911高等教育出版社

The items bear minimal signs of past use, such as light scratches or memories in the form of markings. These signs of wear give the items a charming character and tell stories of their previous owners, while not affecting their functionality.