单项选择题
A.25% B.50% C.60% D.70% E.80%
A.＞10% B.＞20% C.＞25% D.＞40% E.＞60%
A.≥10% B.≥30% C.≥75% D.≥90% E.≥95%
A.10% B.20% C.30% D.40% E.50%
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