单项选择题
A.2%B.2.5%C.1.5%D.1%
A.5-10B.10-20C.20-30D.30-40
A.6.5B.7.3C.8.3D.9
A.多雨带B.湿润带C.半湿润带D.半干旱带
A.200~400mmB.400~600mmC.800~1600mmD.1800~2400mm