题目内容：
A.D/P or D/P at xx days after sight
B.Delivery of documents against letters of undertaking to pay
C.Delivery of documents against promissory note
D.Delivery of documents against a signed trust receipt
E.Delivery of documents against part of collection to be paid at sight and the balance by way of the acceptance of a separate draft payable at a future date.
F.D/A
参考答案：【答案仅供学习，请勿对照自行用药等】