???????16????????????????
?????50?????
? ??????????60???
1?? ???????????д??????????3???
?????????????????
2????????д?д????12???
b?? ?? ???? ?? ??? ?? ???? ?????? ??
li??n ?????? ???? ???? ???? ???? ?????? ?? ????
j?? ?? ???????? ?? ???????? ?? ?????? ????? ??
3??????????????????????6???
??h?? h?? huo qi??ng qi??ng ji??ng??
???? ?????? ???????????? ????? ?? ??
????????? ?? ????? ?? ??? ??????????
4???????д????С?Σ??????????????????4???
A??????? B???? C?????? D????
|