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.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

以太网交换机有四种不同交换结构，即软件交换结构、、矩阵交换结构、总线交换结构和（）交换结构。

注册消防工程师应当通过继续教育不断更新、补充、拓展知识和技能，完善知识结构，提高综合素质和专业技术水平。根据《注册消防工程师继续教育实施办法》，下列说法中错误的是(    )。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

钢结构用钢主要是热轧成形的钢板和型钢等，钢板最小厚度大于（）mm为厚板，主要用于结构。