??2??21????????? (?? ??????????? ???)2?????21??,????????????
?:????????????????????????????,?,???????????????,??
????????:??,????????????????????,????(?)
????:??????
?????????????????
??:“????”??????????
????3????????:???????
4?10??????????10????13?
???2???????188??????16??
????????????????
??2?????????0.4%
??GIF-???????????1??????
???:??????????????????
????????????346???????
????3????????:???????
???:??????????????????
??:???????????????????
????????????10???????
??-????????????????????
???:??????????????????
??gif-?????????????????
????:?????????????????
????!?3?????9.8?????????
?????20????????????????
??????????????4?????2??
4?10??????????10????13?
??!????????4-0?????!
??????????????????????????
??????:?????????????