exp userid=zf/j@oracle9i tables=xsxkbn file=xsxkb20110825_2.dmp
exp userid=zf/j@oracle9i tables=(table1,table2,table3) file=xsxkb20110825_2.dmp
REF:
https://community.oracle.com/thread/841934
https://community.oracle.com/thread/1119117
http://stackoverflow.com/questions/5428872/multiple-table-export-in-oracle