题目内容

按同一生产厂家、同一等级、同一品种、同一批号且连续进场（厂）的水泥，袋装不超过（）t为一批，散装不超过（）t为一批，每批抽样数量不应少于一次。

A. 200，500
B. 200，300
C. 300，400
D. 200，400

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