A.鐵路運(yùn)輸B.公路運(yùn)輸C.水路運(yùn)輸D.管道運(yùn)輸
A.40% B.45% C.49% D.51%
A.30000-45000 B.25000-40000 C.15000-30000 D.4000-10000