IUC各物体表面的细菌菌落应达到什么程度为卫生标准?
A.≤5cfu/cm(上标2)
B.≤10cfu/cm(上标2)
C.10~15cfu/cm(上标2)
D.15~20cfu/cm(上标2)
E.<25cfu/cm(上标2)
正确答案是A
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