????????????????? 2??13????,??,???? ???? ? 2?13?????,?,??CT???????????????,????,??????????? ???????????????? ? 2???????????????13?,?,????????????????????????????????? ????? ???? 2?13?????,?????,????,??70%,??????????“?”???????????? ???? ?? 2???????????????13?,?,??? ? ???? 2????13?,???????????,???????? ???? ?? 2?13?,?,??????????,????70%,???“?”?? ???????????? ?? 2?13?,????,??????????,??????????? ? ? 2??13??,?????,?,????70%,????“????”?????? ????? ??????????? 2?13?????,?????????,???????????? ??????????????? ????? ????????:??