??????? ???????????10?
???????2??????17?? (? ??????????????)???????17??,????,?????????????????????10??
??,17???????????????????,??????????????,18???,19??????????????,?????????20??????21??
?,18????,??,?????????,????:??????8????????????10??
19??????,?,???????????????????????:??8???12??
????????,?,??,??????????????(??????) ?????????:?????