hipage 2012-7-23 00:51
退休教師發明無毒農藥
6月16日，山東聊城市茌平縣賈鳳霞夫婦試喝無毒農藥。今年70歲的退休老教師雷慶峰發明出了一種能喝的無毒農藥，它的特點是人畜飲服無礙，對殺蟲、殺細菌和預防蔬菜疾病有著良好的效果。
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