????:1????????:????????

2?????????

3????????????

4?????

5??????

?????2????????????2?????????????? (???????????????? ??????)??????????????(????????????????????????????)?????2??????????????1?,??????????????????????

??,??2??????1?,?,???

?,?????????????????,????????????????????????????????,?????

????2????????????????????1??,????90%??

2?2?????,??????????????????????????,?????????????(??) ??????????????????:????????????????????