下图表示机体的免疫反应清除抗原的过程示意图下列说法中正确的是 A.效应b细胞必须由b细胞受到抗原刺激而增殖分化产生 b.b细胞t Template




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tomski下图表示机体的免疫反应清除抗原的过程示意图下列说法中正确的是 a.效应b细胞必须由b细胞受到抗原刺激而增殖分化产生 b.b细胞t coloring