单项选择题
A.黄金储备差额 B.外汇储备差额 C.黄金输送点 D.外汇政策
A.A.UD.1=SGD.0.5517 B.A.UD.1=SGD.1.0092 C.A.UD.1=SGD.1.8123 D.A.UD.1=SGD.2.0986
A.押汇 B.信汇 C.电汇 D.票汇