钢筋混凝土用砂的氯离子含量不应大于(),预应力混凝土用砂的氯离子含量不应大于()。 A、0.01%,0.03%B、0.02%,0.01%C、0.03%,0.01%D、0.02%,0.03% 发布时间:2025-06-26 09:47:12