单项选择题

（）is the first procedure of L/C business.

A.
B.
C.

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Usually a letter or email focusing on urging the buyer ...

单项选择题Usually a letter or email focusing on urging the buyer to establish the relative L/C by the seller often consists of the three parts, which is not include? （）.

A.
B.

重叠式浇口就是侧浇口。

未知题型重叠式浇口就是侧浇口。

血证的主要病因病机是什么？

未知题型血证的主要病因病机是什么？

（ ）is the first procedure of L/C business.

（）is the first procedure of L/C business.