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