The basis of bank's examination and negotiation are（）.
A. contract and letter of credit
B. contracts and documents
C. documents and letters of credit
D. letter of credit and power of attorney
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In practical business, it is most common to issue a letter of guarantee in the form of ().
A. straight open
B. notification through advising bank
C. being opened bythe transmitting bank
D. being opened by the transfer bank
In the payment of international trade payment, the functions and characteristics of bills are（）.
A. main means of circulation
B. main means of payment
C. negotiable and transferable
D. bond certificate
E. credit instruments
Which of the following bills is divided into prompt and after sight？（）
A. Cheque
B. Promissory note
C. Bill of exchange
Documentary draft
E. Bank note
In a confirmed and irrevocable letter of credit, the bank that bears the first payment responsibility is（）.
A. negotiating bank
B. confirming bank
C. issuing bank
D. advising bank
E. all relevant banks
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