题目：
前苏联学者卓有成效地研究了高分子量的聚氯乙烯作为絮凝剂型助滤剂，根据对铁矿、煤及非金属矿所作的过滤实验，证明聚氧乙烯具有絮凝和降低表面张力的双重功能。
答案：
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参考答案：智力劳动
前苏联学者卓有成效地研究了高分子量的聚氯乙烯作为絮凝剂型助滤剂，根据对铁矿、煤及非金
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