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【正文】 ? Electricity is a good _______. It flows through a ____ . A _____ measures the amount you use and you get a ____ for it is like water in a ____. Electricity is ______. However, we can change it into _____________ that we can ____,____and sometimes electricity is much we must ____________it. servant wire meter bill monthly way invisible forms of energy see hear feel more dangerous be careful with Read paragraph48. Fill in the b
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