25. 企业对处于导入期的产品可花费较多的促销费用,也可花费较少的促销费用;在产品的订价上既可订高价,也可订低价,因此,企业有( )相应策略可供选择。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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