立井运送雷管或炸药时，信号把钩工怎样确保安全？

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.

制冷工应做到四勤，勤看仪表，勤摸机器温度，勤听机器有无杂音，勤调有关阀门。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

（）在调制方面，分为直接调、锅内混合加热调两种。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在模块化教学考试系统中进行在线学习，应点击（），可以查看系统中所有模块的教材。

在工作表中记载着某次考试成绩，要查看学生语文成绩的排名情况，应（）。