建筑幕墙防火构造的正确技术要求有（）。 A.幕墙与各层楼板之间

问题多项选择题

建筑幕墙防火构造的正确技术要求有（）。

A.幕墙与各层楼板之间的水平防火带应采用岩棉或矿棉等材料填充，其厚度不应小于1OOmm

B.防火层应用厚度不小于1.0mm的镀锌钢板承托

C.防火层的填充材料应与玻璃紧密接触，不得留有缝隙

D.同一幕墙玻璃单元不应跨越两个防火区

E.无窗槛墙的幕墙，应在楼板外沿设置耐火极限不低于1.0h、高度不低于0.8m的不燃实体裙墙

答案

参考答案：A, D, E

解析：建筑幕墙防火构造要求：（1）幕墙与各层楼板、隔墙外沿间的缝隙，应采用不燃材料或难燃材料封堵，填充材料可采用岩棉或矿棉，其厚度不应小于100mm，并应满足设计的耐火极限要求，在楼层间和房间之间形成防烟带。防火层应采用厚度不小于1.5mm的镀锌钢板承托。承托板与主体结构、幕墙结构及承托板之间的缝隙应采用防火密封胶密封；防火密封胶应有法定检测机构的防火检验报告。（2）无窗槛墙的幕墙，应在每层楼板的外沿设置耐火极限不低于1.0h、高度不低于0.8m的不燃烧实体裙墙或防火玻璃墙。在计算裙墙高度时可计入钢筋混凝土楼板厚度或边梁高度。（3）当建筑设计要求防火分区分隔有通透效果时，可采用单片防火玻璃或由其加工成的中空、夹层防火玻璃。（4）防火层不应与幕墙玻璃直接接触，防火材料朝玻璃面处宜采用装饰材料覆盖。（5）同一幕墙玻璃单元不应跨越两个防火分区。故本题答案为“A、D、E”。

完形填空。
Time spent in a bookshop can be enjoyable. __1 you go to a good shop, no assistant will come near to you and say, "Can I help you?" You __2 buy anything you don't want. You may try to find out. __3 the book you want is. But if you fail, the assistant will lead you there and then he will go away. It seems that he is __4 selling any books at all. There is a story which tells us about a good shop. A medical student __5 a very useful book in the shop, 6 it was too expensive for him to buy. He couldn't get it from the library, either. So every afternoon, he went there to read _ 7 at a time. One day, however, he couldn't find __8 _ from its usual place and was leaving when he saw an assistant signing to him. To his surprise, the assistant pointed to the book __9 ,"1 put it there so as not to be sold out," said the assistant. Then he __10 the student to go on with his reading.
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