?
????????????????????????????
?
8250??
2017??1113????????????@???????
?????R?Nancy Lee and Perry R Bass???????8131???5.4??????19905??????8250????????
???1889????1890729?????????????????????
???????????????????????????????????????????????3??50.3 64.9????
??
400?
???2017??627?????????????2424.5??2.12?@??????103???7??????
?????????????????B?????????????
???????????
???
??
??????
e???
????????????٧????????????????
?????????????400??????????????????????
?
????
?????400??????????????
1987?5390????3950?1990??8250???????1998????7150?2014?????6180????3.77????3
??????????????????????????????????????????
400???????????????????????????????????????????????????????????????????????????????????????????
??????
??
?37??????????????????????????զ??????????????????????????????????????????????????1895??20?????????????????????????????3
??864?1037150?????????????35?
1888?զ???????????????????
??????? ?
???
??