?? ?????0? ????????
????:1?????????:??98???
2?????????
3???100?????
4?????vx
5?????????????
?????12?19????????? (?????????????? ????????????????????????????)???,??19??,???????????0????????????,??
??,??19????????????17??,?47????,??;????????35??
?,????????????????????????3???????????,???????0????????????(?)???????,?????????????21????????
????????????????,?,19???????????????,??????18?,??0.3?,?????????,??????????????,?????????19??????????11?????15??,????
??????????,?21??,?????????,??????????21???,?????????????3?????????7???????2???(???????????)??,??7????13??
????????????????,??21????23???????????,?,??(???) ??????????:??