填空题

Paint containing lead is a major (11) of lead poisoning in children. The heavy metal enters the body when children breathe the paint dust or fumes in the (12) Or when babies put their mouth on painted surfaces or swallow pieces of paint. Lead can (13) the brain and the nervous system. It can decrease intelligence, create behavior problems and slow a child’s (14) . Researchers tested new household enamel paints from twelve countries in Africa, Asia and South America. The paints were sold under different (15) names. The study found that almost three-fourths of the brands had dangerously high levels of lead. Paint containing lead is a major (11) of lead poisoning in children. The heavy metal enters the body when children breathe the paint dust or fumes in the (12) Or when babies put their mouth on painted surfaces or swallow pieces of paint. Lead can (13) the brain and the nervous system. It can decrease intelligence, create behavior problems and slow a child’s (14) . Researchers tested new household enamel paints from twelve countries in Africa, Asia and South America. The paints were sold under different (15) names. The study found that almost three-fourths of the brands had dangerously high levels of lead.