1Determination of Fluoroquinolones in Traditional Chinese Medicine Powder by UPLC-M S/M STian Xiaoling, Liu Kai40-422Investigation and analysis of the virus infection situation of Porcine Respiratory Disease ComplexGu Zhida, Wang Hongyan43-44,453Research About P49 Serum Antibody Dynamic Rule of Mice Infected by TrichinaZhu Jiangwei45-474CNCPS system in corn straw dairy cow diets nutrition research reviewsZou wen, Xi weibin48-50,515Bulls Semen research for freezing temperature variation curve and spermatozoa resuscitation lawLiu rangzhi, Deng Fujin, Wang guilian, Wang Huaqing51-536Comparison of Two Kinds of Effectiveness of Duck Hepatiis Virus Freeze-dried Yolk Antibody Test MethodWu Di, Liu Xian, Wang Yi58-60