????:1???????100????:?????vx

2????????

3???????

4?????????

5???????

????10?7???? (?????? ?????)????????????????????????,???

???????7???,????????????12?,?2100??????????????????????????27?,??27%?42%?

??:“10??5????????,???4.3???????”

?????????????,?????????????????????????,?????????????????X???????????CT??????????????,????????????????,????????????????????

??????,????????136???????????,?,????????????????????????????(???????“????”)?5400??,???????50%,???,10??1??1280??????,????????????

??????100??,???????????????????????????,???????????????????????,????????,??????12.7????????????????(???) ???:??