单项选择题
A.1.2m B.1.8m C.1.0m D.1.4m
A.1.0m B.1.5m C.1.8m D.2.0m
A.底宽6m,底长16m B.底宽7m,底长36m C.底宽7m,底长16m D.底宽8m,底长25m
A.底宽6m,底长16m B.底宽6m,底长36m C.底宽7m,底长16m D.底宽8m,底长25m
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