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What is `^M` and how do I get rid of it? - Unix Linux Stack Exchange The ^M is a carriage-return character If you see this, you're probably looking at a file that originated in the DOS Windows world, where an end-of-line is marked by a carriage return newline pair, whereas in the Unix world, end-of-line is marked by a single newline Read this article for more detail, and also the Wikipedia entry for newline This article discusses how to set up vim to
g 应是 9. 8 N kg，还是 9. 8 m s²？ - 知乎 这个问题本质上不是物理问题，真要回答的话，根据定义，1 N =1 kg m s²，等式两边同时除以kg，得到1 N kg = 1 m s²，所以9 8 N kg = 9 8 m s²，两个单位完全等价，证毕。 不过，这个问题里真正有价值的讨论其实是： 为什么我们能够把物理量“力”的单位称为“牛顿”？