?? ??????????????????
????:1??????:??????????
2?????
3?????vx?
4???????
5???????
??????????(10?????????????)???????,11?????????89.2,??????????10??0.2??,??????????2?????????
?????
??????????????,????????????,????????????????????,????,9??,??????????,??
?? ??????????????????:11????????????0.5??,???????,?????????????,???????????????????,??????????????,?“???”?????
??????????
?????????????,?????????????????,?????0.6?????????????0.5?????,??????????????????????????????????????????????????,???
??????,??????????,?,?????????????,????????????,?????????????
?? ???????:?,?????????????,?????,????
(??? ??????????????? ???????????)
??????????????????:???