Project 2007 USES this calendar to schedule tasks that do not have resources assigned, or for tasks that have a task type of fixed duration.

Project 2007使用项目日历去排定没有资源分配的任务的日程，或者类型为固定工期的任务的日程。

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There are three task types: Fixed Units, Fixed Work, and Fixed Duration.

有三种任务类型：固定单位、固定工时和固定工期。

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