??????????????????????2?16?????????????? ??,???????,???
???????????????:??????????????
?????????????????????
?????????????:???????????
????????????????high?
??:??????????????
???:?????????????????
???:??20???????????????
???:??????????????????
??????????:????,????!
???????????????????
????????????10???????
?????????????:???????????
?????????????:????3???
??????????:????,????!
??:??????????????
GIF-???????????????????
???CBA????3???8???6???
??!????????4-0?????!
???????????????????
??2?????????0.4%
?????????????????????
GIF-????!?????????????
??GIF-???????????1??????
??:??????????????????
????:???????????????
???CBA????3???8???6???