题目内容
In practical business, it is most common to issue a letter of guarantee in the form of ().
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In the payment of international trade payment, the functions and characteristics of bills are（）.
Which of the following bills is divided into prompt and after sight？（）
In a confirmed and irrevocable letter of credit, the bank that bears the first payment responsibility is（）.
Which of the following payment methods uses commercial credit？（）
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