单项选择题
A.订货时即支付货款;优惠待遇 B.订立合同;优惠条款 C.有顺序付款;优惠条款 D.订立合同;优惠待遇
A.shipping mark;port of discharge B.place of delivery;shipping mark C.port of loading;port of destination D.port of discharge;port of loading
A.lessee B.lesser C.lessees D.lessers