单项选择题
A.0.2mg/3m B.0.4mg/3m C.0.6mg/4m D.0.5mg/4m
A.10% B.12% C.14% D.13%
A.1220mm×2460mm B.1220mm×2440mm C.1220mm×4000mm D.1220mm×2400mm
A.27D B.30D C.31D D.28D
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