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1·The exchange rate risk that the construction unit of the highway faces is shown as the trade risk mainly. The risk is the change of the receivable assets'and the payable debts'value.

公路建设单位面临的汇率风险主要表现为交易风险，即由于外汇率波动而引起的应收资产与应付债务价值变化的风险。

2·Therefore, the foreign trade enterprise must establish the perfect credit risk management function and undertakes the customer risk control and the account receivable management responsibility.

因此，外贸企业必须建立健全专门的信用风险管理体系，专业化地承担客户风险控制和应收账款管理的责任。