砂影响砌筑砂浆流动性的因素，主要是用水量、水泥用量、级配及粒形等，与砂子的粗细程度无关。
查看答案
砂浆的稠度越大，分层度越小，则表明砂浆的和易性越好。
A. 对
B. 错
砂浆的保水性用（）来评价。
A. 沉入度
B. 坍落度
C. 分层度
D. 保水率
砂浆抗压强度试验的试件数量为一组（）块。
A. 10
B. 6
C. 3
D. 9
In what way is Chusovitina different from her competitors?
A. She has competed in two Olympic Games.
B. She doesn’t represent any country.
C. She is older.
D. She has a son.
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