?? ???:??????????????80%????
????:1????????:?????????
2?51??ios???
3?????
4???????
5?????????????
???12??????????5???? ????????????????,????????????????????????????«?????»?12????????5????????,???????????,???????????????«??????????»???????,?????????????????????
??????????,????????????????????????????????,??,???80%?,?96.6%,??????????18.9??????????,?,???????????????
???:???????????????????