当平屋顶防水层采用二道防水设防，其中应有一道卷材，该屋顶的防水等级为（）。

平屋顶的承重结构考虑到防水的要求宜采用（）。

可以在（）阶段采用Make-or-buy决策分析。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

平屋顶涂膜防水屋面主要适用于防水等级为Ⅲ级的屋面。（   ）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

平屋顶隔热的构造做法很多，例如卷材防水屋面采用正面覆盖铝箔的高聚物改性沥青防水卷材屋面，就属于（）降温。

平屋面一般为现浇或预制的钢筋混凝土平屋顶作基层，上面铺设卷材防水层、刚性防水层、涂料防水层等的屋面，为了排水通畅，常用（）的坡度。