以下矫正方法哪种是错误的。（） ["机械矫正","液压矫正","火焰矫正","手工矫正"]
As a result of peace talks between Ireland and Britain a peace agreement on Northern Ireland was signed in（）. ["April 1997 ","May 1997","April 1998 ","May 1998"]
大学生创业与社会人创业有何不同？
焊接工艺评定的一般程序中第二步是（） ["拟定焊接工艺指导书","检验试件和试样","施焊试件和制取试样","测定焊接接头是否具有所要求的使用性能"]
根据造型形式来看，雕塑一般可分为（）和（）两大类。
试述克里斯泰勒中心地理论的基本内容。
