题目内容

路堤高度小于2m时，吹砂路堤可以一次吹填。

A. 对
B. 错

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[听力原文]11-15A mother and her seven-year-old daughter were resting in their room in a big hotel in Thailand when suddenly a fire broke out. Very soon thick black smoke started to come into their room and there was hardly any air. Their lives were in danger. The mother opened the door only to find that the hall way was also full of smoke. She ran to the telephone to call for help but the line was dead. Then she put wet towel over her daughter’s face and her own so that they could breathe. Later firefighters lowered a rope from the hotel roof to their window level and pulled them up to the roof. Eighty-four people were killed in the fire and fortunately they were saved. When the mother opened the door, what did she findShe found that the hall way was（）

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简述工程建设项目采用代理型CM模式的优缺点。

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