エンジンやプロペラを使わずに「イオン推進器」で空を飛べる飛行機を開発…マサチューセッツ工科大学！
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![「給食」選択しない家庭に1食あたり340円給付制度、なにも食べ物を持ってこない子どもが現れる [237216734]](http://matome-ch.com/image/9/8286399.jpg)
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