单项选择题
A.0.070%～0.15% 0.20% C.1.23%～2.24% D.0.73%～0.82% E.3.0%
A.<0.15% B.>0.20% C.1.23%～2.24% D.0.73%～0.82% E.3.0%
A.5％ B.10％ C.15％ D.20％ E.25％
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