简述城市轨道交通系统环境控制的要求和主要措施.

城市轨道交通系统

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述城市轨道交通安全系统管理的途径。

《城市轨道交通管理条例》规定哪些属于禁止危害城市轨道交通安全的行为？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。