题目内容

下列物质中不属于抗原物质的是（）

A. 毒素
B. 微生物
C. 植物花粉
D. 生理盐水

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抗原是指进入人或动物细胞内能和（）结合或和（）结合，引起人或动物免疫反应的任何体外物质。

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