题目内容

动物机体抗病毒感染免疫中,在消化道、呼吸道黏膜免疫中起主要作用的免疫分子是()。[2010年真题]

A. IGG
B. 干扰素
C. 趋化因子
D. 白介素-2
E. 分泌型IGA

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安全阀整定压力试验不得少于多少次,且每次都必须达到相应标准的合格要求。

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