試題分類：英語
In a project plan, when the project manager schedules activities, he (or she) often uses ( ) method,precedence relationships between acticities are represented by cireles connected by one or more arrows. The length of the arrow represents the duration of the relevant activity.
A、causality diagram
B、Gantt chart
C、histogram
D、arrow diagram
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信管網(wǎng)參考答案：D
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