1. __________________________________________________________________3
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3. ______________________________________________5
4. ______________________________________8
5. ____________________________________9
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8.
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( ), , , .. (, ) (, ).
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, 90 . , 90 , .
. 1.
. 1. U , , ; U=4.
( ) υ ≤ 5 /. , .
4 1000 / 4 132 6 3,2%.
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