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The result indicated that the σ-AgFeO2 phases are the main att ribution to the surface oxygen property and CO oxidation activity of catalysts.M eanwhile,the Ag/Fe(1∶1)catalyst exhibited the highest reducibility and CO oxid ation activity among the other ratio of catalysts which resulted with the cr ystal of the σ-AgFeO2 in catalysts.

研究结果表明，催化剂上生成的σ-AgFeO2晶相结构对催化剂的表面氧性能及CO氧化反应贡献较大，同时发现，Ag/Fe(1∶1)催化剂的还原能力、氧脱附能力明显优于其他比例的催化剂，并与 CO氧化活性相对应。

Catalytic techniques for deep desulfurization, denitrogenation and dearomatization in production of clean gasoline and diesel fuels were reviewed, especially those for producing low-sulfur and extra-low-sulfur gasoline and diesel oil, among which technologies arousing most attention are sulfur-reducing FCC catalyst and additives, selective hydrogenation catalysts and technology, adsorptive desul-f urization of gasoline and diesel oil, biologically catalytic desulf urization of diesel oil, and selective oxid...

为面对新世纪清洁燃料生产的新机遇和新挑战，各种生产清洁燃料的催化技术正在竞相开发之中，尤其是生产低硫、超低硫汽油与柴油技术。其中，催化裂化降硫催化剂和助剂、选择性加氢处理新催化剂及工艺、汽柴油吸附脱硫、柴油生物催化脱硫和选择性氧化脱硫等新技术尤其引人注目。我国应加快清洁燃料生产催化新技术的开发研究，为生产更清洁的汽油和柴油燃料提供技术储备。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。