单项选择题
A.商品检验单 B.商品包装单 C.货运单据 D.商业发票
A.pay to Johnson Co. Ltd. Only B.pay to Johnson Co. Ltd. and its order C.pay to bearer D.pay to the order of Johnson Co. Ltd.
A.办理国际汇兑 B.提供信用保证 C.融通资金 D.减少汇率风险