Zhong guo qing shao nian bai ke quan shu

By Jianghong Ji, Baohua Jia, Zhengbing Ren

Subjects: Ke xue zhi shi ., Zi ran ke xue ., Qing nian dou wu ., Ke xue zhi shi, Zi ran ke xue

Description: Ben juan nei rong bao kuo:yu zhou, Di qiu, Sheng wu jie, Ren ti yu yi xue, Ke xue zhi shi wu bu fen nei rong.