单项选择题
A.120000mm B.125000mm C.130000mm D.135000mm
A.2.5s B.3.5s C.4.5s D.5.5s
A.12000mm B.12500mm C.13000mm D.13500mm
A.成材率 B.定尺率 C.合格率 D.建龙率
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