The immune system is composed of immune organs, immune cells, and immune-active substances.
免疫系统的组成包括免疫器官、免疫细胞和免疫活性物质。
问题 | 免疫系统的组成。 |
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答案 | 免疫器官、免疫细胞和免疫活性物质。 |
Tags: 生物必修3
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