人造卫星是利用 ____波来传递信息的，该波在真空中的传播速度约为 ____m/s．人造卫星在工作时所消耗的电能是由太阳能转化而来，太阳能属于 ____（填“可再生”或“不可再生”）能源

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   Everybody wants to be healthy. You know food is very important. There are lots of healthy food. You can have more bananas, apples, oranges, tomatoes and lettuce because fruit and vegetables are good for you. But don’t eat too much chocolate. It’s not healthy food. Healthy food can make you grow (生长) and make you strong（强壮的） and happy. Remember there is a saying—“An apple a day keeps the doctor away（远离）”. Sports can also keep you healthy. Get up early and do some sports every day. Don’t be lazy（懒惰的）. You will be healthy and happy.