如图所示粗细均匀的玻璃管a和b由一橡皮管连接构成连通器一定质量的空气被水银柱封闭在a管内这时两管水银面一样高b管上方与大气相通.若 Template




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tomski如图所示粗细均匀的玻璃管a和b由一橡皮管连接构成连通器一定质量的空气被水银柱封闭在a管内这时两管水银面一样高b管上方与大气相通.若 coloring