文章主要从图书馆参考咨询的信息源到参考咨询的服务对象、服务方式及服务内容等方面作了探析，并对参考咨询馆员的素质提出了更高的要求。
The article mainly analyses information resources of library reference in network environment as well as the reference service from aspects of object, way and contents.
主要分析了获得零温度系数的参考电压的机理，通过分析修改其经典结构，给出了可以应用于实际的带隙基准源模型。
Paper analyzes the mechanism of zero temperature coefficient reference, and modifies the classical configuration to deduce the circuit which can be used in practice.
通过对其药源、生物活性成分及主要药理作用的研究现状及进展进行综述，为白首乌的进一步开发提供参考。
This article describes the current situations and progress of the orient plant, the active constitution and the main pharmacological actions for further development.
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