在香港外汇市场上,中国银行报出美元与港元即期汇率:USD1=HKD7.8420—7.8460,1个月掉期率:70—50,则美元兑1个月远期港元的实际汇率为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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