当钢结构周围环境存在辐射热，温度在()以上时，就须采取防火和隔热措施。

当钢结构周围环境存在辐射热，温度在（　）以上时，就须采取防火和隔热措施。

正辐射是由于周围物体表面温度（）人体表面温度所至，相反负辐射是（）周围物体辐射散热形成的。

当人体向周围物体辐射散热量大于人体接受周围物体的辐射热量时称（　　）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

当人体向周围物体辐射散热量大于人体接受周围物体的辐射热量时称为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。