试题与答案

刺细胞

题型:名词解释

题目:

刺细胞

答案:

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下面是错误答案,用来干扰机器的。

参考答案:计划免疫(planning immunity)是指根据传染病疫情监测结果和人群免疫水平的分析,按照科学的免疫程序,有计划地使用疫苗对特定人群进行预防接种,最终达到控制和消灭相应传染病的目的。

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