右图表示淋巴细胞的起源和分化过程其中字母表示细胞数字表示过程下列有关叙述正确的是a.人体内只有ab两类细胞能识别抗原b.产生抗体的 Template




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tomski右图表示淋巴细胞的起源和分化过程其中字母表示细胞数字表示过程下列有关叙述正确的是a.人体内只有ab两类细胞能识别抗原b.产生抗体的 coloring