科研之友
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<正>Look around.Are your lights on?Is your computer running?Electricity (电)makes them work.Electricity is a kind of energy (能源).We use energy every day.We put gasoline(汽油)in our cars.We use natural gas (天然气)in the kitchen to cook food.Where does this energy come from?Renewable (可再生的) energy comes from wind,water,sunlight,plants and so on(等等).They won’t run out(用完,耗尽).They are cleaner(更洁净的).People
