搜索 - 科创

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上周末，一只傻傻的麻雀不知是从哪个窗户飞进我家楼道，被我赶到家中。忽然想起以前听人说过黑暗中的鸟很怕手电光，稍有光亮就会飞走。于是我萌生出一个“邪恶”的念头：如果用突如其来的强光照射，麻雀会有什么反应...

前几天看到有同学用粉笔做喷头，真的提醒了我，这东西加工太方便了，我用每个大约1cm长，两头两个深度的锥体腔，最后泡在硅酸钠饱和溶液，然后放在石棉瓦上加热烘干表面水分，最后让他自然干燥就不管了，这样一来...

今日闲逛某宝无意刷到一个小视频一个电焊笔的广告组装了一个小金属探测器由于十分简单且原材料易得所以闲来无事制作测试一下欢迎各位大佬指教废话不多说：原理图如下很简单不仔细画了 ...

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