单项选择题
One of the very important documents in the foreign trade business is BL. B/L is the abbreviation for ______.
单项选择题 We have received your letter of 23 November ______ reply to ours of 12 November.
单项选择题 世界上管道运输技术最先进的国家是( )。
单项选择题 在一般的货物(不包括大宗商品和机械设备)买卖合同中,关于索赔问题( )。