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個體受到細菌感染時，下列何種細胞最早聚集在感染部位？ (A)自然殺手細胞（natural killer cell） (B)淋巴細胞（lymphocyte） (C)巨噬細胞（macrophage） (D)多型核白血球（polymorphonuclear leukocyte）

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