单项选择题

It is an irrevocable( )which can not be changed．

A．letter of credit
B．bill of lading
C．quarantine
D．quality
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单项选择题
“The goods are in nude．”means( )。
A．The goods are packed with wooden box
B．The goods are packed with iron box
C．No basket is used for the goods
D．No package is used for the goods
单项选择题
英译汉：“Certificate of processing；Certificate of valuation”，正确的翻译为( )。
A．加工证书；分析证书
B．价值鉴定证书；加工证书
C．分析证书；价值鉴定证书
D．加工证书；价值鉴定证书
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