无瓦斯涌出的硐室可采用扩散通风且硐室的深度不得超过多少米，入口宽度不小于多少米。

对于掘进断面不大于15m2、高度小于4m的硐室和巷道，宜采用（）施工方法。

单独装设高压电器设备的硐室应装设局部接地极。

不属于副井系统的井下硐室是（  ）。

副井系统的硐室包括(  )。

副井系统有哪些硐室？主井系统有哪些硐室？

按硐室在井底车场中（）不同可分为副井系统硐室、主井系统硐室以及其他硐室

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。