【单选题】【消耗次数：1】
下列关于普通混凝土的主要技术性质的表述中，正确的是（）。
①
混凝土拌合物的主要技术性质为和易性，硬化混凝土的主要技术性质包括强度、变形和耐久性等
②
和易性是满足施工工艺要求的综合性质，只包括流动性和保水性
③
混凝土拌合物的和易性目前主要以测定流动性的大小来确定
④
根据坍落度值的大小将混凝土进行分级时，坍落度160mm的混凝土为流动性混凝土
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