工字钢的切割顺序为（）。
A.
B.
C.
D.
参考答案：A
由于采购是一种经济活动。因此科学采购和科学的采购物流管理是实现企业利益最大化的利润源泉。
In the contract, usually there is a ________ clause to protect the buyer against loss from delay of the shipment of the goods.
A．payment B．shipmentC．penaltyD．quality
