?1?????7? ??,??6.8??????????,???????,??

?,??????????10????????????1?;10~20??????????1???????????;20~50???4???????????????4?????????????1????7??10???????????43?????,????????

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

?????????????????:???????? ??“??????”????

?? ???????????????

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

2??????????

3?????????

4?????

5??????

?1?????7? ??,??6.8??????????,???????,??

?,??????????10????????????1?;10~20??????????1???????????;20~50???4???????????????4?????????????1????7??10???????????43?????,????????

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

?????????????????:????????