( ) is generally accepted, L/C must be established 15 days before shipment.

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( ) is generally accepted, L/C must be established 15 days before shipment.
A.It
B.As
C.That
D.What

本题关键词:BE值,B超,B血,抗B,B木根,B木叶,B型血,B胆汁,B纤维,B类表;