A, B, C, D. 1, 看懂L/C 必熟讀英文(一). 2, 1, 40A, Irrevocable credit, 不可撤銷信用狀. 3, 2, Documentary credit, 跟單信用狀. 4, 3, 31C, Date of Issue, 開狀日.
163.27.6.18