为了研究免疫的产生同学们做了以下实验.步骤一取6只小白鼠做实验平均分成甲乙两组.步骤二甲组的小白鼠取活的肺炎双球杆菌注入体内乙组的 Template




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tomski为了研究免疫的产生同学们做了以下实验.步骤一取6只小白鼠做实验平均分成甲乙两组.步骤二甲组的小白鼠取活的肺炎双球杆菌注入体内乙组的 coloring