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Hace 18 horas · The chemistry of molybdenum and tungsten show strong ... It maintained a price at or near $10,000 per tonne from 1997 through 2003, and reached a peak of $103,000 ... Compared to the United States, which has a greater supply of molybdenum in the soil, people living in those areas have about 16 times greater risk for ...
Hace 18 horas · Sign of different coexisting school types on a school complex in Germany. Education in Germany is primarily the responsibility of individual German states (Länder), with the federal government only playing a minor role.. While kindergarten (nursery school) is optional, formal education is compulsory for all children ages 6 to 18. Students can complete three types of school leaving ...
