影响砂浆强度的因素主要有水泥强度和用量、水灰比、基层材料的吸水性等。
A. 对
B. 错
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A. It was built during wartime.
B. It was destroyed during wartime.
C. It was the only building in the city built long before the 1920s.
D. It was the only building in the city that wasn't destroyed during war.
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A. They decided to keep the pub there forever.
B. They destroyed the pub and refused to rebuild it.
C. They tried to protect the pub as a historical place.
D. They wanted to rebuild it using the original materials.
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A. Because it was owned by a rich person.
Because it was the only meeting place for people.
C. Because it has always been standing there.
D. Because it had a special place in the city's history.
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