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???? ??????? ???? ??????
???? ????? 70% ?? ????? ??????? ?80% ?? ???????? ????? ???????? ??????? ?????? ??????? ???????? ???? ?????? ???????? ???????? ??????? ??????.
???? ??? ???? ???????
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???? ???? ??????? ?????? ????? ?????*
??? ???? ??????? ???? ???? ????? V ??? ????? ???? ??? ??????? ??? ????? ?? ?????? ???????? ?? ????? ??? ??? ??? W. ????? ??? ??????? ???? ??????? ?????? ??????? ??????? ???????? ?? ???? ??????? ??????? ??? ????? ??????? ???????.
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????? ???????
??? ?????? ??? ????? ????? ?? ???? ????? ?????? ?????? ???? ???????? ?????? ?? ??????? ?? ???? ??? ????????.
???? Black Box
???? ????? ????? ??????? ???????? ???? ??????? ?????? ???? ????? ?? ?? ??? ???? ???.