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fossil fuels. electric power. nuclear energy. coal power.
BaFBr:Eu2+ Na2S2O3·5H2O Na2CO3 CH3COOH a-Se
changed the growing season. spurred the use of canals. forced the farmers to desert agriculture. led to declining populations.
get people to trust their own solutions to problems keep people as knowledgeable as their“superiors” train people’ s capacity to speak up for their rights make things more favorable for“superiors”
it is too bad for youngsters to be a bit fat. it is necessary for the children to be a bit fat. youngsters should struggle with their body image. overweight children should not diet.
changed the growing season. spurred the use of canals. forced the farmers to desert agriculture. led to declining populations.
BaFBr:Eu NaSO·SHO NaCO CHCOOH a-Se
X-1.96SE≥XT X-1.96SE≌XT≌X+1. 96SE X+1.96SE≤XT X-1.96SE<XT≤X+1.96SE
Se<15% 15%≤Se<35% 35%≤Se<70% Se≥70%
BaFBr:Eu NaSO·5HO NaCO CHCOOH a-Se
Everyone involved will not benefit from gossip. Philosophers may hold different attitudes toward gossip. Dr. Ronald De Sousa regards gossips as perfectly advantageous. People are generally not conscious of the value of medical gossip.
Se6+ Se4+ Se2- 总硒 Se6+和Se4+