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

2?????????

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

4??????????

5?????

??6??????20????????? ??:?????????19?????????

????????????19????,??,???????15?17??????????????,??

??,??????18????????????????41???????????,????95%??????????,?????????????,?????,“??”?

?????????????,?1800???????,??????????

?,??????75%??????????,??,?????????,?,????????????????????????????????????4???????????????????19???????,????60????????????(????????????????) ??????????????:?????