A.100—150mm; B.200—300mm; C.400—450mm
A.巖漿巖、火成巖、變質(zhì)巖 B.火成巖、沉積巖、變質(zhì)巖 C.巖漿巖、火成巖、沉積巖
A.干噴; B.濕噴; C.潮噴