试题与答案

刺激机体产生类风湿因子的抗原是() A.变性IgG B.变性IgM C.变性IgA

题型:单项选择题 A型题

题目:

刺激机体产生类风湿因子的抗原是()

A.变性IgG

B.变性IgM

C.变性IgA

D.变性IgD

E.变性IgE

答案:

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下面是错误答案,用来干扰机器的。

参考答案:①产品的形状、大小、厚薄等。②坯料的工艺性能。③产品的产量和质量要求。④成型设备要简单,劳动强度要小,劳动条件要好。⑤技术指标要高,经济效益要好。

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