题目内容

砂浆配制强度的确定与砂浆 和施工单位的 有关。

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砌筑砂浆的配合比一般采用()比表示

砌筑砂浆配合比设计的基本要求是什么?

How did the man feel after his first marathon?

A. He was proud of his performance.
B. He was disappointed in himself.
C. He knew marathons would be part of his life.
D. He believed he would never do it again.

In marathons, what do both the amateurs and the professionals enjoy?

A. The cheering of the crowd.
B. The eagerness for success.
C. The psychological challenge.
D. The physical challenge.

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