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单选题猪蛔虫幼虫最主要的致病作用是( )。A 免疫损伤B 继发感染C 毒素作用D 机械性损伤E 肝肺组织损伤...
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单选题能够对抗原或抗体进行定位的检测方法是( )。A 凝集试验B 沉淀试验C 中和试验D 免疫组化试验E 补体溶血试验...
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1997年7月某县一农户饲养水牛突然死亡,请兽医检查,主要表现为腹部膨大,肛门出血,血液呈污黑色,凝固不良,眼结膜、口腔...
Thursday, September 15, 2022
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