???
?? ?????????????????]??????????a????????????????????????????
?????????,?????,???.????????,??,???K?,?????.??K???????,??K??.????.
1,?,??,,,????,???,?,?,??.?.
2,,???.
???
? ???? ????
?? ?
? ??? ???
?????1??? ?????2?? ???????? 3???4?? ?????????????????????5?6???????7?L???8????????1? ?????????????????????2? ???????????2???????????????????????????????3? ??????????????????????2~3?1???4? ?????????5?? ????????U??6?? ?????????????????????????????????b?????????????????????