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【多选题】
关于砌筑砂浆，下列说法正确的是（）。A.
一般砌筑基础宜选用水泥石灰混合砂浆
B.
砌筑砂浆宜选用细砂
C.
水泥砂浆选用的水泥，其强度等级不宜大于32.5级
D.
强度等级为M5以下的水泥混合砂浆，砂的含泥量不应超过10%
E.
石灰膏在水泥砂浆中起增强砂浆和易性的作用
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