A.≤10CFU/皿 B.≤20CFU/皿 C.≤30CFU/皿 D.≤40CFU/皿 E.≤50CFU/皿
A.四份 B.兩份 C.三份 D.五份 E.六份
A.>80% B.>85% C.>90% D.>95% E.>99%