单项选择题
A.营养琼脂 B.半固体琼脂 C.平板计数琼脂
A.无菌水 B.生理盐水 C.营养肉汤
A.10s B.20s C.30s D.1min
A.0.5-1.0% B.1.2%~1.5% C.1.0-1.5%
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