A.100g~300gB.300g~1000gC.1000g~2000gD.2000g~4000g
A.黏質(zhì)土B.細(xì)粒土C.粗粒土D.粉質(zhì)土
A.越大B.越小C.無規(guī)律D.二者無關(guān)