单项选择题
A.腘淋巴结B.下颌淋巴结C.颈前淋巴结D.腹股沟淋巴结
A.IgMB.IgGC.IgAD.IgE
A.IgGB.IgMC.IgAD.IgE
A.3-5B.5-7C.9-12D.12-17
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