【简答题】step2: Instead of focusing on the ___ try to find something positive in every negative situation. 查看完整题目与答案 【简答题】Shopping on the Internet is becoming more and more popular.Why do people use the Internet to shop? Some people say it is more convenient.They d...
The single secondary winding L1 - L2, with an earthed centre tap designated as the neutral, provides a single-phase 240 V supply between L1 and L2 and two single-phase 120V supplies, which are out-of phase by 180°, between L1 & N and L2 & N. Hence it is referred to as...