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单向板肋楼盖结构平面布置方案优缺点

答案

参考答案：

①主梁横向布置，次梁纵向布置。优点：主梁和柱可形成横向框架，横向抗侧移刚度大，横向框架间由纵向依次相连，房屋整体性好②主梁纵向布置，次梁横向布置。增加了室内净空，但房屋横向刚度较差③只布置次梁不设主梁。适用于有中间走道的砌体承重的混合结构房屋

听力题

A）根据括号中所给的汉语写出单词，使句子意思完整正确。

1. People ran in all ______(方向) in fear when the earthquake hit the city suddenly.      

2. A video game will bring us ________(无尽的) hours of fun.

3. Water turns into ice if the temperature drops ______(低于) 0℃.

4. The boy was badly hurt in the traffic accident. He ________(几乎不) said a word when he was sent to the hospital.

5. Cities are getting much more ______(拥挤的) because of the new immigrants. 
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问答题

立效丹2功效与作用
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