????:1???????:?????150??

2?????sn????

3???????????

4?????

5??????????

??????????????????1?????“???”

??2????7?????????? (???????????????????????? ???)?,??,???????????????,???????????“???”?

??7?,????????1?????,?47.8??,??13.3???(??,??),???7%?2%?????????(1????28??2?4??),????????????11.22??????3.72?????????????????

2???6????????,??????????????? ????

??????????????????????1?????????????,??????29964?,??63%??,??8817???

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

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