22. ( )是由债务人主动将款项交付给本国银行,委托其使用某种汇付工具,支付一定货币金额给国外债权人的汇兑方式,有信汇、票汇、电汇。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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