A、15m B、30m C、40m D、50m
A.5% B.10% C.15% D.20%
A.Ⅰ B.Ⅱ C.Ⅲ D.Ⅳ
A.6 B.7 C.8 D.9
A.0.5mm B.1mm C.100 D.200
A.0.3mm B.0.4mm C.0.5mm D.0.6mm
A.1‰ B.2‰ C.2.5‰ D.6‰
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