搜索 - 科创

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我简单分析一下：在我们蛙泳以及自由泳的时候，鼻子在水中的情况，这样，因为你在憋气的时候，鼻子里面本来就有一点空气，在你浸入水中的时候，鼻子朝下，这样空气不便出来，所以水就进不去啊！

引用第41楼的卢宝马于2010-06-20 14:42发表的 :LZ的空心铜管水冷很有创意，但加个制冷系统最好，冷却水开锅貌似用不了多久。

轴流式小型水力发电机说明书一、水力发电原理：在有水位差的地方，水从高处往低处流，水有一定的流动速度，因此水带有动能；因为水位差，水在高处被地球的引力吸引往低处，从而水带有重力势能，水的动能和水的势能总和就是水的能量

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