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1. ???? ???. ????????????? ???? 2.702gNaN3 ???, ?? ????? ??? ???????????????? ???? 1/3 ???. ??????????? ?????? ????????? ??? ??????? ????? ??? ???? ??? ?????.
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3. ???????????? ??? ???????? ????? ????????? ??????????? ?????? ??? ????????, ???? ??? ??? ??????? ????? ???? ???? ??? ????.
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5. ??????? ???????? ????, ???????????? ????-??????? ??? ??? ???????????????? ?????????? ???????????? ????? ????????? ????? ????.
Resources. ????????????? ??????? ??????, ????????????? ??????? ??????? ????????? ???????? ?????????? ???, ?? ?????? ???? ????????? ????????? ???????? ?????????? ???.
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