Under the guidance and inspiration of previous studies, the author of this study investigates the frequency effects on the depth and breadth of vocabulary acquisition in L2. As a hot and disputable issue within this field, most researchers a...

本文以试验为基础，结合污秽绝缘子放电闪络发展变化规律，系统研究不同湿度和污秽度下绝缘子泄漏电流的频率和相位特性，分析了泄漏电流与作用电压之间的相位差与湿度的关系，...