单项选择题
A.Certificate of empty tank; Certificate of fumigation B.Certificate of fumigation; Certificate of cleanliness C.Certificate of empty tank; Certificate of cleanliness D.Certificate of cleanliness; Certificate of empty tank
A.letter of credit; letter of guarantee; license B.letter of guarantee; letter of credit; license C.letter of guarantee; license; letter of credit D.license; letter of credit; letter of guarantee
A.途径口岸;签证地点;产地 B.产地;签证地点;途径口岸 C.签证地点;产地;途径口岸 D.产地;途径口岸;签证地点