本文完全用初等的方法证明了完全集上连续可微函数都有可微开拓。
By very elementary method, it is proved that every continuous differentiable function defined in a perfect set has differentiable extension.
间歇试验结果表明，对于微污染原水可以通过电解水供给氢气进行自养反硝化，并且通过对电流的控制可提高脱氮速度并可达到完全脱氮。
The batch operation demonstrated that the autotrophic denitrification with hydrogen produced from electrolysis of water can be used to treat the micro-polluted raw water.
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