?? ????????????
????:1??????:??????????
2?????98?????
3???????
4???????
5?????
???6???8??? (???????)?????????????????8????????????CT?????????????????,????,???????????,????,????
6??8??????????????,?????????????????????????????????? ???1978????????,?????????,?????????????(?????????????)????????????????????,??????????
????????????????,?????,????????????,?????,?????????????????????????????,???????????????CT????????,?????????
??,????????:??1?????????33?????????????????19????U??,????32?????????????23?????;?1??44????????,???????????????????8???????????52??????????????????4??????????????????????????
??(?)?(????)????????????,????????,??????????????????????????????????,???,???????????,????????????,???????
??,??,??????????????????????????????????????????????,?????,????,????(?)
??:???????????