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The following diagram denotes dependency between two activities A and B,It says （ ）
A.B can’t start before a is finished
B.B can’t finish before a is finisheD.
C.B can’t start before a starts
D.B can’t finish before a starts
B.B can’t finish before a is finisheD.
C.B can’t start before a starts
D.B can’t finish before a starts
参考答案
参考解析
解析：翻译：下图关于A和B之间的依赖关系，说法正确的是：A．活动A完成前活动B不能开始 B．活动A完成前活动B不能完成C．活动A开始前活动B不能开始 D．活动A开始前活动B不能结束参考答案：A
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