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。

可以在（）阶段采用Make-or-buy决策分析。

正铲挖掘机的工作特点是什么？反铲挖掘机的工作特点是什么？

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

全息摄影的基本原理是什么？为什么必须采用激光光源曝光？

挖掘机装载时，铲斗可以从汽车司机室上方通过。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。