肺炎双球菌有多种其中一种叫r型细菌菌体无多糖类荚膜是无毒性的另一种叫s型细菌菌体有多糖类荚膜是有毒性的可使人患肺炎或使小鼠患败血 Template




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tomski肺炎双球菌有多种其中一种叫r型细菌菌体无多糖类荚膜是无毒性的另一种叫s型细菌菌体有多糖类荚膜是有毒性的可使人患肺炎或使小鼠患败血 coloring