e6503375_009__Tanpa_Klasifikasi_Lugansk__3
[0] 101. [1] They conduct a survey on the children health in city of N. It was defined that in 23\% of cases lead content of blood was higher than 10 mkg/l. What was the principal source of pollution of urban environment with lead compounds? [2] *ethyl gasoline using [4] porcelain producing [5] cable producing [3] 
using lead-containing paints battery producing
Krok 2009: Tanpa Klasifikasi Lugansk
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