【单选题】【消耗次数：1】
根据流动物质组分，泥石流可分为（ ）。
①
A.河谷型泥石流和山坡型泥石流
②
B.水川型泥石流和降雨型泥石流
③
C.粘性泥石流和稀性泥石流
④
D.滑坡泥石流和溃决泥石流
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③
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