大型变压器围屏爬电故障的原因和特点是什么？
箱位的表示方法，由贝位、（）和层位三部分组成。
室内电气设备、电力和通讯线路应有防火、防鸟、防鼠等措施，并应经常巡视检查。
A resistance in a circuit of unknown value is to be tested using the voltmeter/ammeter methodTherefore, the meters should be connected with（）. ["both meters in series with the resistance","both meters in parallel with the resistance","the ammeter in series and the voltmeter in parallel with the resistance","the ammeter in parallel and the voltmeter in series with the resistance"]
船舶从进港到离港的全部作业包括：联检、（）、装卸作业、技术作业、（）、离港。
环境对电力变压器运行有何影响？
