???????????????!????|????????????
????????? ????????????? | ?????????? ????????
????????,“??,???????????????”“??,????????”???????????
??????,???????,???????
????
????????,??????????????????
????????????
?,????????????,???,?????????,?????
?????D,????????,?????????
????????,???????????????D??????,?D??????
????????
??,???????????????????????
????
1.?????????????????????
???????:????,?????????????????????,???1000~1200???????????,??????
???D:???????????D??????,??????(??????????????20?)?????????D?????????(????????????)???
????????????????????:???,???????????????,???????????,???,??????
2.?????????????
?????????:????????????????????,???,??,???????????,???????,??
???????????????:????????????????????????,??,?????????,???
??:???????????,???????,?????????????,???????????
?????
?
??????
????,???????????????X??(DXA)???????????X???????,??????????????????????????T?????=-2.5,????????????
???
?????????????
???????
??,?????????,??????????????????,????????????????????????????????,????,??????????????
?????????:??+??,???????????????????
??????:??????????????????,?,???,???????????,??????????
???:?????????????????? ??????
????:????????????