PASSAGE THREE [br] How do the traditional vaccines work?To provoke an immune sys

游客2024-09-10 3

问题 PASSAGE THREE [br] How do the traditional vaccines work?

选项

答案 To provoke an immune system．

解析原文最后一段对传统疫苗和新型疫苗进行对比描述，传统疫苗运用已经死亡或濒临死亡的病毒来培养人体免疫系统。故答案为“To provoke an immune system．”。

转载请注明原文地址:https://tihaiku.com/zcyy/3751359.html

相关试题推荐

随机试题

最新回复(0)

PASSAGETHREE[br]WhatdoesMazzelameanbysaying"thetippingpointwillbeb