危险货物押运员应按规定穿着印有（）“押运”字样的黄色马甲，不符合规定的不得押运。

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.

挖掘机不得挖掘未经爆破的五级以上的岩石或冻土。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

挖掘机装载时，铲斗可以从汽车司机室上方通过。

起重机司机在吊运工作是必须听从（）的指挥。

不得用（）吊运物料。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。