问题
单项选择题
( ) is generally accepted, L/C must be established 15 days before shipment.
A．It
B．As
C．That
D．What
答案
参考答案：B
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( ) is generally accepted, L/C must be established 15 days before shipment.
A．It
B．As
C．That
D．What
参考答案：B