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H3c Ch 2 ch2 c= Ch ch3. H2c Ch c ch3 ch3 ch3. H2c=Ch-ch3+h2. H3c-Ch--Ch-ch3+h2.
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Почему почв
H3c Ch 2 ch2 c= Ch ch3. H2c Ch c ch3 ch3 ch3. H2c=Ch-ch3+h2. H3c-Ch--Ch-ch3+h2. 