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Book Description paperback. Condition: New. Paperback. Pub Date: 2019-05-01 Publisher: Chemical Industry Press Co. Ltd. This book is suitable for Asperberg children and related educators above elementary school. The language is concise and easy to understand. It is rich in content and covers almost all children. Problems you might encounter on campus. While pointing out the problem. it also provides a practical solution. Specific to an example to solve a certain . Seller Inventory # NO025522