A、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>树的生成法</strong></span>
B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>求最小树法</strong></span>
C、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px"><strong>求最短路法</strong></span>
D、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px; TEXT-DECORATION: none"><strong> 求最大流法</strong></span>
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