单项选择题
A.0.2-0.4 B.0.4-0.6 C.0.6-0.8 D.0.4-0.8
A.聚合 B.纺丝 C.中试 D.毛条
A.-10 B.-5 C.0 D.8
A.5.5% B.12% C.24% D.44%
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