????????????

????:??????:??????????

????????6?????????8? (????????????????????????)??8????????????????CT???????,???,??????????????,??????,?????????

6????8????,????? ??

?1978??????????????,?????????????????????????,?????????????????(????)??????????????????????????????????????,???

???,?,???????????????????,???????????????????????,???????????,??CT????????????,?????????????????

????,???:????????????????1?????????????33?????????19?????????????U??,???32????????????????????????23?????????????????;?1????????????44?????????,???8????52??4?????????

??(?????????????????)?(?????)

????????,?????????????????????,???????????????????????????????,???????????,???,?????????,?????????????

???????????,??????????,???????????????????,????,??,?????????(??)

??:?????