【单选题】【消耗次数：1】
在相同用水量情况下，水泥越细，其（ ）。
①
混凝土拌合物流动性大，但粘聚性及保水性较好
②
混凝土拌合物流动性大，但粘聚性及保水性较差
③
混凝土拌合物流动性小，但粘聚性及保水性较差
④
混凝土拌合物流动性小，但粘聚性及保水性较好
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