北京语言大学 / 英语商务通论
正确率：100%
In order for a document to be a negotiable instrument, it must contain several characteristics: _ _ _
A.it must be in writing and signed by the maker ordrawer
B.it must contain an unconditional promise or order to pay a specific sun of money
C.payment must be made on demand or at a definite future date
D.it must be payable to order or to bearer
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