润滑油的作用是()
A.冷却、润滑
B.冷却、密封
C.润滑、冷却、密封
D.润滑、密封
参考答案:C
A -- Letter of Credit
B -- discounting
C -- international transactions
D -- beneficiary
E -- document of title
F -- acceptance
G -- negotiable instrument
H -- guarantee
I -- draft
J -- shipping document
K -- default risk
L -- bill of lading
M -- maturity
N -- foreign exchange risk
O -- term of payment
P -- currency
()承兑()物权凭证