单项选择题
A.＜0.04% B.＜0.05% C.＜0.06% D.＜0.07%
A.降低氧含量；自聚物；≤0.2% B.降低二聚物；过氧化物；≤0.2% C.降低氧含量；过氧化物；≤0.2% D.降低二聚物；自聚物；≤0.2%
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