win2000系统 ,8i的8.1.7数据库用下面这第语句备份出来his_trans1.dmp文件,恢复回去的语句怎样写.麻烦救命呀!exp system/manager file=d:\数据备份\his_trans1.dmp log=d:\数据备份\his_trans_log1.txt tables=(drug.INVOICE_INFO,drug.INVOICE_DETAIL,drug.INVOICE_TF,his_trans.kc21,his_trans.kc22,his_trans.kc23,his_trans.kc24,his_trans.kc25)