???????2,???′??2????????,???′??2???????????
??????′??2??????+13???????????
???+13?????????????100%
??????+13??+14??+15??????????????????????100%?????
?????????? | ?????????? | ??????????? | ?????????? |
?????????? | ??????????? | ?????????? | ??????????? |
??????′??2???????????http://austindefensivedrivingonline.com/cycs2/