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Thank you very much for meeting with me yesterday about our project. I really appreciate your help. And we’ll take your suggestions into consideration when we ____20___for the next year.It was____21____ to have someone like you who has had experience with similar projects.I appreciate your taking the time out of your busy schedule to ____22___ me.I’ll ____23____to send you a follow-up when this project is completed. Please let me know if I can ____24___ the favor and when.

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建筑砂浆是由胶凝材料、细骨料和水按一定比例配制而成的建筑材料。

A. 对
B. 错

在配制砌筑砂浆时,选择水泥强度等级一般为砂浆强度等级的4 ∽5 倍。

A. 对
B. 错

分层度表示砂浆的什么性能?( )

A. 流动性
B. 保水性
C. 砂浆强度
D. 砂浆粘结力

沉入度是测定砂浆的( )。

A. 保水性
B. 流动性
C. 黏结力
D. 变形1.分层度愈小,砂浆的保水性愈差。(错)

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