e6503375_009__Tanpa_Klasifikasi_Lugansk__3
[0] 135. [1] The group of Ukrainian tourists visited Malaysia. By WHO statistics this country has a high rate of morbidity owning to water-borne infections. What way of water disinfecting should they use? [2] *boiling [4] freezing [5] iodination [6] UV irradiation [3] 
ozonizing
Krok 2009: Tanpa Klasifikasi Lugansk
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