[名词解释] 锥体系统

在选择确定地基处理方案以前应综合考虑因素_________。 ["A．气象条件因素","B．人文政治因素","C．地质条件因素","结构物因素"] 以下土层哪些属于软土地基？ ["A．泥炭","B．黄土","c．红土","D．杂填土","E．淤泥质土","F．冲填土","G．细砂土","H．粉砂土","I．坡积土","J．残积土"] 锥体系统