单项选择题
A.1:10 B.1:8 C.1:12 D.1:5
A.20mm B.30mm C.35mm D.40mm
A.1m2 B.1.5m2 C.2m2 D.1.8m2
A.1.15m B.1.05m C.1m D.1.10m
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