单项选择题
A.0.8~1.1 B.0.7~1.1 C.1.2~1.3 D.1.5~1.7
A.0.5~1.4m3 B.1.5~3m3 C.3~5m3 D.>5m
A.20~30m B.5~10m C.10~15m D.15~20m
A.5%~10% B.20%~30% C.10%~15% D.15%~20%
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