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????? ????????????. ???????????? : ???????? ?? ??????? ??? ???????? ?? ????? ?? ?? ??? ???????? ???? ?? ????? ??? ??????? ?? ????.????? ???????? ?????? ?? ????????????:(CH2O)n. ?? ???? ???? ??????????:. ???????????? ?? ?????? ?????? ?? ???? ??????? ?? ????? ??? ???????? ????? ??? ???.?????

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    1. ???????? ?? ??????????? ??? 3 ???? ???? ??? ???: ????????????

    2. ????? ???????????? ???????????? : ???????? ?? ??????? ??? ???????? ?? ????? ?? ?? ??? ???????? ???? ?? ????? ??? ??????? ?? ????. ????? ???????? ?????? ?? ????????????: (CH2O)n

    3. ?? ???? ???? ??????????: ???????????? ?? ?????? ???? ?? ?? ???? ??????? ?? ????? ??? ???????? ????? ??? ???. ????? ????????? ?? ?????????? ????? ??????? ?????????? ????? ??????? ?? ???? ???????? ????????? ?? ?? ???? ?????. ??? ????????? ???????? ???? ???? ??? ?? 20 ???? ?????????? ?????.

    4. ???????????? ???????? ?? ??????? ?? ??? ?? 2 ???? ????????? ???? ???? ???? ???? ????? ?? ?????? ?? ?? ?? ??? ??? ?? ??????? ??????? ??????? ?????. ?? ??? ??????????: ????? ????

    5. ?????? ????????????

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