A high performance liquid chromatography - mass spectrometric ( HPLC - MS ) method for microdetection of carbendazim in Dendrobium candidum Wall. 用 高效液相色谱 - 质谱联用法定量检测铁皮石斛、西洋参药材及其制剂中的多菌灵残留.
Few people, when it comes down to it, are so selfless.说到底，很少有人能这样无私。It is the working class that is most selfless.工人阶级最大公无私.His selfless spirit is revealed in every thing he does.他无私的精神表现在各个方面....