木马利用恶意代码破坏受感染主机的计算资源和网络资源，然后通过网络将该段恶意代码感染大量的机器。

一般中木马的主机上被安装了木马的（）

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.

安全教育中的专业安全技术知识教育是指对某一工种进行必须具备的专业安全技术知识教育，不含（）知识教育。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

安全科学知识体系包括安全科学、安全工程学、安全工程、专业安全知识。

（）则主要是综合知识、专业知识的考试。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。