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

2???????????

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

4????????

5????????

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

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

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

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

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