Solutions of Mg(NO3)2·6H2O, Al(NO3)3·9H2O, NaOH and Na2CO3 were mixed in a rotating liquid memb rane reactor. The crystal growth process of Mg Al CO3 hydrotalcite was then studied by adding different amounts...Solutions of Mg(NO3)2·6H2O, Al(NO3)3·9H2O, NaOH and Na2CO3 were mixed in a rotating liquid memb rane reactor. The crystal growth process of Mg Al CO3 hydrotalcite was then studied by adding different amounts of water to the resulting slurry during the crystallizing process. The initial 6 hours of the crystallization was found to be the key period controlling crystal growth. Adding 150 to 250mL of water to the reaction system at the beginning of crystallization affords Mg Al CO3 hydrotalcite with relatively small particle size and large aspect ratio.展开更多
概述英语学习活动观的内涵。基于学生发展核心素养要求,以沪教版初中《英语》八年级(上)Unit 4 Great inventions为例,探究在初中英语阅读课教学中如何设计基于语篇的学习理解类活动、深入语篇的应用实践类活动及超越语篇的迁移创新类活...概述英语学习活动观的内涵。基于学生发展核心素养要求,以沪教版初中《英语》八年级(上)Unit 4 Great inventions为例,探究在初中英语阅读课教学中如何设计基于语篇的学习理解类活动、深入语篇的应用实践类活动及超越语篇的迁移创新类活动,从而激发学生的思维,培养他们的学习能力,实现学科育人目标。展开更多
文摘Solutions of Mg(NO3)2·6H2O, Al(NO3)3·9H2O, NaOH and Na2CO3 were mixed in a rotating liquid memb rane reactor. The crystal growth process of Mg Al CO3 hydrotalcite was then studied by adding different amounts of water to the resulting slurry during the crystallizing process. The initial 6 hours of the crystallization was found to be the key period controlling crystal growth. Adding 150 to 250mL of water to the reaction system at the beginning of crystallization affords Mg Al CO3 hydrotalcite with relatively small particle size and large aspect ratio.
文摘概述英语学习活动观的内涵。基于学生发展核心素养要求,以沪教版初中《英语》八年级(上)Unit 4 Great inventions为例,探究在初中英语阅读课教学中如何设计基于语篇的学习理解类活动、深入语篇的应用实践类活动及超越语篇的迁移创新类活动,从而激发学生的思维,培养他们的学习能力,实现学科育人目标。
