某企业只生产加工一种产品,其盈亏临界点销售额为200,000元,企业正常开工的销售量为1,000件,销售收入为250,000元,固定成本为50,000元,则达到盈亏临界点的作业率为( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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