当土壤的渗透系数在0.1~1.0m/d时,宜采用井点法排水。()
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液体的饱和蒸气压仅与液体的本质和温度有关,与液体的量和液面上方空间的体 积大小无关。
Automatic water spray provides a network of sprinkler heads throughout the protected spaces.
Napoleon launched his attack in the winter of 1812.
The primarily use of the word “terrorism” is to gain attention and to serve as a tool of propaganda