The first source of profit reduce resource consumption, improve labor productivity.第一利润源泉是降低资源消耗、提高劳动生产率.

单项选择题The name of this musical piece is ______. ​​ A、Huo Wu Liu Qing Niang B、Jackdaws Gambol Water C、Qiu Si D、Zhugongdiao Pink Lotus

单项选择题Information platform is important for modern logistics.信息平台是现代物流的重要组成部分.