16 下列之有向圖(directed graph)中,共有多少個強連通部分(strongly connected components)? 
(A)2
(B)3
(C)4
(D)5
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統計: A(188), B(86), C(75), D(18), E(0) #1027571
統計: A(188), B(86), C(75), D(18), E(0) #1027571