????Facebook????????????ж????????????????μ???????ù??????????????
????Facebook????????????????????????(SEC)??????б??????????ι???????????Facebook??????????????PC???Facebook?????“????????????????????????????????????????????δ??????????????????Σ????”
???????????￡???????????????????г?????????ι???????????????????????????????в???????Facebook?????á?Facebook??????????????????????????Facebook?????г???15.5????????ù??????????????????????ι?????????????????????в??
?????????????Facebook??????????45???????????78%??????????