Jing ji xue ji chu

Descripción

Ben shu yi qi ye jing ji yun zuo wei zhu yao xian suo, tong guo jing ji xue ji ben li lun he ji ben ji zhi de jie shao, xi tong di fen xi le qi ye zai shi chang zhong de sheng chan xing wei, zai bu tong shi chang jie gou xia de jue ce xing wei, yi ji qi ye jia ge jue ce he tou zi jue ce deng.