（）指的是那些以抽象形式表现出来，以功能形式作用于教育实践的科学知识，如系统方法等。

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.

《国防教育法》规定国家设立全民国防教育日。请问国防教育日是哪一天？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

日常教育包括安全活动、班前讲话、演讲会、知识竞赛等。

“三类人员”指的是哪三类人员?

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下面关于国防的基本特征的说法错误的是哪一项？（）