钢材化学成分中，（　）是决定钢材性能的最重要元素。

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.

说明C元素对钢材力学性能有什么影响？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

什么叫钢材的疲劳断裂？影响钢材疲劳强度的因素有哪些？

钢材对碳元素有什么要求？

钢材中碳元素含量提高对钢材性能的影响是（）

对钢材的强度有什么要求？

为了提高钢材的弹性，可在钢材中加入（）元素。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。