配电线路按某一电压值分为高压配电线路和低压配电线路，这个电压值是（）

城镇的高压配电线路和低压配电线路宜同杆架设，且应是（）

变配电工程工程量应根据变配电站的施工图从进线开始先高压后低压的顺序进行计算。 ( )

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。

通常电力网电压高低的划分：低压（）、中压（）、高压（）、超高压（）、特高压（）。

五带的划分，以有无（）和（）两种天文现象为标志，以（）和（）为纬度界线。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。