【題目】 黑龍江和松花江水量豐富而且含沙量小的主要原因是（ ）

A．地勢平坦，支流眾多 B．氣候濕潤，森林茂密

C．氣溫較低，地勢平坦 D．降水豐沛，草原遼闊

【答案】B

【解析】

試題分析：黑龍江和松花江水量豐富而含沙量小的主要原因是氣候濕潤,森林茂密,植被生長好,水土流失差．

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