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Electrical Technology Exchange Edition [Weekly Question] 20170927

2017-09-27View Original

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This post was last edited by RSchufaqi on 2017-10-13 07:53. To increase the popularity of this section, a weekly question activity has been launched; we hope everyone will participate actively :) . Participation Prize 5 Wealth ; Correct answer rewards 10 wealth points. Question: For first-class loads, they are usually powered by ( ) independent power sources to ensure continuous power supply. A. One B. Two C. Three D. Two in parallel

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