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

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

3?????kb??

4??????

5??????

?????????7??????????????15?? ???,??????7??15???????06?????????:????,7??15??08?????????????16???????????08??????????????????????????,?????????????????????????????????????????????,?????,????,??????????????????(250~270????)??????(?30~50??????????,????????????80??),???????????????

?:

1???;

2???????,??;

3??????,?????????????,?;

4???????????????????,?????????????????????

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