简述电力系统运行状态的分类。

论述电力系统正常运行状态下的主要特点。

在电力系统正常运行状态下，电网调度自动化系统的作用表现在，（监视系统的运行情况），通过（静态安全分析）、动态安全分析对系统的安全水平做出评价。当发现系统处于警戒状态时，及时采取措施使系统尽快恢复到正常状态。

运行是指机组（）在电气上处于联接到电力系统工作的状态（包括试运行）。

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。

山西大学改为国立后，工学院存在哪些系？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。