搜索 - 科创

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今天在电脑文件夹里淘，结果发现了一个挺好的有关有机化学实验的电子书因为本人有机方面知识极为浅薄，所以还没开始学习有机化学实验，还没有看过这本书，但刚刚粗略翻了一下，当中有大量的有机化学实验，而且还附带...

屁的成分　　作者：[美]吉姆·道森　　好吧，以下有点儿专业化了，但我只会说一遍，因此注点儿意，看仔细了。和喷气发动机将煤油燃料转化成喷薄而出的一声巨响一样，你创生一个屁，同样也是将结肠里未完...

这种发动机是伦敦的牧师罗巴特斯特林（Robert Stirling）于1816年发明的，所以命名为“斯特林发动机”（Stirling engine）。斯特林发动机是独特的热机，因为他们理论上的效...

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