单项选择题
A.25% B.60% C.50% D.70% E.80%
A.>10% B.>20% C.>25% D.>40% E.>60%
A.≥50% B.≥60% C.≥70% D.≥75% E.≥80%
A.>90% B.>80% C.>70% D.>60% E.>50%
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