铸造用碳钢一般用于制造形状复杂，力学性能要求较高的机械零件。

形状复杂、体积也较大的毛坯常用（）铸造方法。

最适合制造内腔形状复杂毛坯的生产方法是（）

可以铸造各种薄壁、形状复杂铸件的铸造合金是（）

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.

形状复杂，尤其是内腔特别复杂的毛坯最适合的生产方式是（）

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。