单项选择题
A.2 B.6 C.8 D.5
A.5 B.6 C.7 D.8
A.1.9m,1.4m B.2.4m,1.9m C.2.4m,2.1m D.2.1,1.9m
A.35Kg B.40Kg C.45Kg D.50Kg
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