Anderson Sherwood’s masterpiece Winesburg.Ohio portrays a series of eccentric characters in the small town of Ohio.Ande......

云南北衙金矿属于典型的岩溶充水矿床,水文地质条件复杂。矿床主要充水水源为大气降水、北衙组岩溶含水层地下水,其次为更新统灰质......