为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Abstract：The writing skills are complex and sometimes difficult to master， requiring not simply the absence of grammatical......

Creative writing is difficult for students.There are some ways to improve it.How to choose suitable words,how to form a ......