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He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.
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2021年春天，广西桂林毛竹山村，习近平总书记来到村民王德利家。，更多细节参见搜狗输入法下载