Which of the following is true according to the text ?A. We

Which of the following is true according to the text ?A. We should keep from t

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A paintings B. regulations C. methods D. computers

A paintings B. regulations C. methods D. computers

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24.小明设计的电磁健身器的简化装置如图所示,两根平行金属导轨相距l=0.50m,倾角θ=53°,导轨上端串接一个0.0

24.小明设计的电磁健身器的简化装置如图所示,两根平行金属导轨相距l=0.50m,倾角θ=53°,导轨上端串接一个0.05 Ω的电阻。在导轨间长d=0.56m的

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