多数病原菌繁殖一代所需时间为A.20~30s B.20~30min C.2~

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问题 多数病原菌繁殖一代所需时间为A.20~30sB.20~30minC.2~3hD.2~3dE.2~3周

选项 A.20~30s
B.20~30min
C.2~3h
D.2~3d
E.2~3周

答案 B

解析
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