A.41.8% B.42.8% C.38.5% D.45.3%
A.13.9% B.12.6% C.16.8% D.10.2%
A.中國(guó)西南、華南酸雨區(qū) B.中國(guó)東南酸雨區(qū) C.歐洲 D.北美