通过查阅分析历年考卷、考纲、学生的答卷情况以及VCE(Victoria Certificate of Education)课程中的英语课堂教学,从基本理论分析、课堂个例探讨两个方面分别阐述了英语VCE考试的现状,并对此进行了分析和研究。主要分析了维州VCE课程教...通过查阅分析历年考卷、考纲、学生的答卷情况以及VCE(Victoria Certificate of Education)课程中的英语课堂教学,从基本理论分析、课堂个例探讨两个方面分别阐述了英语VCE考试的现状,并对此进行了分析和研究。主要分析了维州VCE课程教育的教学特点和对中国高中英语教学的启示和作用,以期改善相应的高中英语课堂教学内容。展开更多
The mixed oxides, VCe and VCe 0.95M 0.05 (M=Cu, Co, Mn, Fe and Cr), were prepared by sol-gel method. The structure and redox properties of these mixed oxides were characterized by XRD, Raman, XPS and TPR techniq...The mixed oxides, VCe and VCe 0.95M 0.05 (M=Cu, Co, Mn, Fe and Cr), were prepared by sol-gel method. The structure and redox properties of these mixed oxides were characterized by XRD, Raman, XPS and TPR techniques. The main phase is tetragonal VCeO 4 phase in all samples. The substitution of Fe, Mn, Cu or Co for Ce results in the formation of CeO 2 or monoclinic VCeO 4 phase. The XPS result indicates that valence of V is +5+δ(δ<1) in VCe 0.95Co 0.05, VCe 0.95Mn 0.05, VCe 0.95Cr 0.05 and VCe 0.95Fe 0.05 samples compared with VCe , on the contrary, valence of V is +5-δ (δ<1) in VCe 0.95Cu 0.05 sample. The Fe, Co, Cr and Mn enhance the reduction of V 5+ in VCeO 4, whereas Cu inhibits this reduction.展开更多
VCE(Virtual Chemical Experiment)是一个基于中学化学实验的虚拟实验操作系统。化学实验是学生获取新知识及培养实验能力和观察力的重要途径。由于真实实验受实验时间、空间和实验仪器药品的限制,在教学中不能够很好展开,因此将化学虚...VCE(Virtual Chemical Experiment)是一个基于中学化学实验的虚拟实验操作系统。化学实验是学生获取新知识及培养实验能力和观察力的重要途径。由于真实实验受实验时间、空间和实验仪器药品的限制,在教学中不能够很好展开,因此将化学虚拟实验引入教学中很有必要。以"制取二氧化碳"为例给出了具体的虚拟实验教学设计,旨在将化学虚拟实验的作用最大化,为化学虚拟实验在教学中的应用提供有效保障。展开更多
文摘通过查阅分析历年考卷、考纲、学生的答卷情况以及VCE(Victoria Certificate of Education)课程中的英语课堂教学,从基本理论分析、课堂个例探讨两个方面分别阐述了英语VCE考试的现状,并对此进行了分析和研究。主要分析了维州VCE课程教育的教学特点和对中国高中英语教学的启示和作用,以期改善相应的高中英语课堂教学内容。
文摘The mixed oxides, VCe and VCe 0.95M 0.05 (M=Cu, Co, Mn, Fe and Cr), were prepared by sol-gel method. The structure and redox properties of these mixed oxides were characterized by XRD, Raman, XPS and TPR techniques. The main phase is tetragonal VCeO 4 phase in all samples. The substitution of Fe, Mn, Cu or Co for Ce results in the formation of CeO 2 or monoclinic VCeO 4 phase. The XPS result indicates that valence of V is +5+δ(δ<1) in VCe 0.95Co 0.05, VCe 0.95Mn 0.05, VCe 0.95Cr 0.05 and VCe 0.95Fe 0.05 samples compared with VCe , on the contrary, valence of V is +5-δ (δ<1) in VCe 0.95Cu 0.05 sample. The Fe, Co, Cr and Mn enhance the reduction of V 5+ in VCeO 4, whereas Cu inhibits this reduction.
文摘VCE(Virtual Chemical Experiment)是一个基于中学化学实验的虚拟实验操作系统。化学实验是学生获取新知识及培养实验能力和观察力的重要途径。由于真实实验受实验时间、空间和实验仪器药品的限制,在教学中不能够很好展开,因此将化学虚拟实验引入教学中很有必要。以"制取二氧化碳"为例给出了具体的虚拟实验教学设计,旨在将化学虚拟实验的作用最大化,为化学虚拟实验在教学中的应用提供有效保障。
