单项选择题 实行自由贸易的理论,首先是由古典政治经济学派的亚当.斯密在其名著《国富论》中提出的。( )A．正确B．错误

单项选择题 It has been established that logistical should be managed an integrated effort to achieve customer satisfaction at the ( ) total cost.lowerB． lowestC． highestD． high

单项选择题 俄林认为要实现国际分工的利益，最好是执行：