单项选择题
A.50m2 B.60m2 C.65m2 D.75m2
A.4m B.6m C.8m D.10m
A.1m3 B.3m3 C.5m3 D.8m3
A.1120,560 B.1260,630 C.1300,650 D.1360,680
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