Catalytic Coking Reformate Blending Version 20190709
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Participation: Prize 1 Wealth； Correct answer: 3 Wealth as a reward. https://bbs.hcbbs.com/static/image/hrline/2.gif https://bbs.hcbbs.com/static/image/hrline/3.gif Multiple-choice question: What is the working principle of a motor? ( ) A. Convert electrical energy into mechanical energy. B. Convert magnetic energy into mechanical energy. C. Convert electrical energy into magnetic energy first, and then into mechanical energy. D. Convert electrical energy into mechanical energy first, and then into magnetic energy. Answer: C https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answer will be announced automatically after two days.
C. Convert electrical energy into magnetic energy, and then into mechanical energy
Multiple-choice question: The working principle of a motor is ( ). C. Convert electrical energy into magnetic energy, and then into mechanical energy