?? ???????????????????!????????|????
![](http://n.sinaimg.cn/front/254/w494h2160/20190406/ary8-hvhrcxm2526744.jpg)
????:1????????????:?????qq
2???????????
3?????????
4???200??
5???????????
????? ???????? | ??? ????
??,“???,?????”“???????,????”???????
![](http://i2.chinanews.com.cn/simg/cmshd/2025/02/19/7f376918c25f4c5c99f1afb6cd7c2e2a.jpg)
??????????,????,???
???
?????????????????????,?
??
??????,?????????????,???????????,????,??
?????????????D,??????,????????????????
???????,????D?,??????D???????????
?????????
???????????????,??????????
??????????????
1.?
?????:??,?????????????????????????,??????1000~1200???????,??????????????
????D:?????????D???????????????????,????????(??20????????)??D???????????????(???????????????????????)?????
?:???,???????????,?????????????????,????????????????????,??????
2.???
???????:????????????,???????????????,??????????,????????????????,????,?????????????
?????????:????????????????,??????,?????????,??????????
????:????????????????????,??????,??????,??????????
???????????
???????????
????
???????????????,???????????????X??????(DXA)????????X?????????????,???????T????=-2.5,???????????????????
????
?
???
?????????????,?????????????????????,????????????????????,???????????????????,??,??????
????:??????+????,?????????????
?:???????????????????????,??????,??,????????????,?????????????
?????:????????????????? ?????????
????:????????????