【单选题】According to documentary credit, the( ), on receipt of letter of credit, will have to prepare shipment of the contract goods within the delivery date.
【判断题】( ) 景泰蓝 13 世纪由蒙古传到北京,盛于明朝景泰年间,又多用宝石蓝、孔雀蓝等蓝色珐琅釉料,因此称之为景泰蓝,也称“铜胎掐丝珐琅”。
【单选题】Documentary credit means payment against( ).
【单选题】当外加电压形成的外电场与PN结的内电场方向一致时,内电场会变 ,相当于阻挡层变 ,PN结处于 状态。
【单选题】Documentary credit deals with ( ).
【单选题】下列药物,可配伍局麻药使用延长其作用时间和减少其吸收中毒风险( )