????:1???9598?:?????????????

2????????

3????????

4???????

5????????

???,??????,????????90%????,????????70%???????????????????,???????,???????????????????????20???1??????????????????????????,?????

??,??180??????????????????????????,???,????????????????????????????,“???,??,????,????????????????1????????????????????????????????????????????????????????????????,???3~20???????”

??????????????????????,?????????????????,??,???30.2???????????????????17.3?????????????????????????21.2??????????,???

??????????????? ?? ?????:????,????????????????,????,???????????????????????

??,?,?????????????????????????????DNA???????????????????

(? ??????? ????????) ???????????????:??????