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【简答题】
设有一组作业，它们的作业提交时刻及估计运行时间如下所示： 作业号 提交时刻 估计运行时间(分钟) J1 8：20 65 J2 9：05 30 J3 9：20 15 J4 9：50 5 在批处理方式下，采用短作业优先调度算法，作业的执行顺序为（ ）。 A)J1，J4，J2，J3 B)J1，J3，J4，J2 C)J4，J2，J3，J1 D)J4，J1，J2，J3
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