对直接承受动荷载而且在负温下工作的重要结构用钢应特别注意选用（）。

在负温下直接承受动荷载的结构钢材，要求低温冲击韧性好，其判断指标为屈服点。（）

在负温下直接承受动荷载的结构钢材，要求低温冲击韧性好的，其判断指标为（ ）。

钢筋冷拉不可在负温下进行。

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.

钢材的性能因温度而改变，在负温范围内钢材的塑性和韧性（ ）

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。