最早用人痘苗预防天花的国家是：_精华吧

最早用人痘苗预防天花的国家是：

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最早用人痘苗预防天花的国家是：

A.中国

B.英国

C.法国

D.德国

E.美国

正确答案：中国

Tag：医学免疫学痘苗中国时间：2023-12-26 21:04:14

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