Determination of Transition Metals at PPT Levels in High-Purity Water and SC2 (D-clean) BathsResults and DiscussionTrace level analysis of transition metals is limited by the purity of water and the reagents. PEEK, metal-free flowpaths are a very ...
作者: 李冀生 摘要: 生活中,人都有发火的时候,老年人更容易发火。这既有生理原因(动脉硬化),也有心理原因。但应该知道,发自内心的"火"尤以"怒火""恨火"为多,生活中有"怒发冲冠"、"恨他牙根子八丈长"之说,可见这些怒火恨火之 DOI: CNKI:SUN:XTDI.0.2004-08-005 年份: 2004 收藏...