單項(xiàng)選擇題在任一個(gè)樹(shù)中,點(diǎn)數(shù)比它的邊數(shù)多()

A.4
B.1
C.3
D.2


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2.單項(xiàng)選擇題無(wú)先例可循的新問(wèn)題的決策稱為()性決策。

A.風(fēng)險(xiǎn)
B.不確定
C.特殊
D.計(jì)劃

3.單項(xiàng)選擇題下列四個(gè)向量中,()是概率向量。

A.(0.5,0.3,0.2,0.1)
B.(0.2,0.4,0.1,0.2)
C.(-0.3,0.6,0.4,0.3)
D.(0.6,0.2,0.2,0)