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? ? ? ? ? ? ? ?. ?????? (Virus, ??) - ??????????????? (Fungus, ??) - ????????????? (Bacterium) - ??????????????? (Nematode) -?????????????? ???(MLO, Mollicute) -???????????? ????(Viroid) - ?potato spindle tuber ?hop stunt??????? - ???????? . . ??????????. . ? 1?m(1 micro meter)=1/1000mm(millimeter):1nm(1 nano meter)=1/1000

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