单项选择题
A.0.1% B.0.15% C.0.2% D.0.25% E.40%
A.0.1% B.0.15% C.0.25% D.40% E.60%
A.霍乱 B.副霍乱 C.传染性腹泻 D.脊髓灰质炎 E.以上都是