???2????15??? ????(USGS)??,???14?,??(??31.66?,?104.18????????)??5.0??,???6.6?????
??????????:???
??????????????????
????????????10???????
??????????:????,????!
????????????346???????
??gif-?????????????????
?????????????????????
?????????????????????
????!?3?????9.8?????????
?????????????????????
??-????????????1-0?????
????:3???????????????
????:??????????????!
????????????????????
CBA?????????????????
????????????346???????
?????20????????????????
??????????????????????????
???:??????????????????
??2?????????0.4%
????:????????????3????????
??GIF-?????????????????
??????????????4?????2??
????:?????????????????
4?1?!??????????????????!
???????????300??????(?)