?? ???????????!????????????|????????

????:1????100?:????????
2???????
3???????
4???????
5???????????
??????????? ??? | ??????? ????????
?????????,“??,????”“??????,????”???????

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