单项选择题
A.20%~40%B.30%~60%C.3%~6%D.10%~20%
A.125℃ B.25℃ C.100℃ D.80℃
A.40~80包/h B.240~280包/h C.100~150包/h D.50~100包/h
A.50~60mm B.30~40mm C.20~30mm D.10~20mm
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