学生理解学科内容并将其转化为智能的最好方式之一,是"参与"到具体问题情境中学习,而精心设计的教育游戏可提供更加真实的"问题情境",有效增强"参与度"。本文在对Conceptual Play Spaces理论分析前提下,...学生理解学科内容并将其转化为智能的最好方式之一,是"参与"到具体问题情境中学习,而精心设计的教育游戏可提供更加真实的"问题情境",有效增强"参与度"。本文在对Conceptual Play Spaces理论分析前提下,理清教育游戏"概念性玩耍空间"的设计要素,基此提出探究式教育游戏的情境设计,促使学生沉浸于丰富的情境,并有效地参与其中,力求使学习"自然发生",实现有意义的学习。展开更多
The character of Hamlet is evidently designed by its illustrious author as a picture of an amiable prince, an affectionate son, a fast friend, and a fine gentleman. Yet in no one of these respects is it by any means i...The character of Hamlet is evidently designed by its illustrious author as a picture of an amiable prince, an affectionate son, a fast friend, and a fine gentleman. Yet in no one of these respects is it by any means intitled to our approbation. From the beginning of the play till his killing the king at the end of the fifth act we find him irresolute, unnatural, inconstant, melancholy and brutal. That Hamlet’s character, thus formed by nature, and thus modelled by situation, is often variable and uncertain. I will content myself with the supposition that this is the very character which Shakespeare meant to allot him.展开更多
Cotton(Gossypium hirsutum L.) fibers,one of the most important natural raw materials for the textile industry,are highly elongated trichomes from epidermal cells of cotton ovules.Among the longest plant cells ever cha...Cotton(Gossypium hirsutum L.) fibers,one of the most important natural raw materials for the textile industry,are highly elongated trichomes from epidermal cells of cotton ovules.Among the longest plant cells ever characterized,cotton fiber is an ideal system for studying plant cell elongation.展开更多
Marine geology is one of the important mainstays in marine sciences.Since themiddle of this century,due to inumerable systematic investigations,especially the appli-cation of advanced science and technology of various...Marine geology is one of the important mainstays in marine sciences.Since themiddle of this century,due to inumerable systematic investigations,especially the appli-cation of advanced science and technology of various kinds,there has emerged a series ofimportant discoveries in the study of marine geology.These discoveries,while makingcertain traditional basic concepts and theories of geology questionable,led to the birth ofa number of new theories.For example,the discovery of changes in the paleooceanic en-展开更多
In-situ observations on α/γ phase transformation were made to study the effects of grain boundary microstructures on the formation of a new phase and the migration of α/γ interphase boundary in an iron4. 2%Cr allo...In-situ observations on α/γ phase transformation were made to study the effects of grain boundary microstructures on the formation of a new phase and the migration of α/γ interphase boundary in an iron4. 2%Cr alloy. It was found that triple junctions with more random boundaries could be the primary nucleation sites for a new phase, while triple junctions with low angle or low ∑ coincidence boundaries did not play any role as preferential sites. The migration of α/γ interphase boundary during heating over the transformation temperature range showed the two stage behaviour characterized by a stage with a migration velocity of 0. 33-0. 75 mm/s and secondly by a stage with 3. 7-7. 6 mm/s. It was also found that abnormal grain growth and a high density of ∑3 coincidence boundaries could occur in a phase with bcc structure after cycling of α/γ phase transformation. A new mechanism of nucleation and growth of a new phase in α/γ phase transformation is proposed on the basis of roles of plane-matching interphase boundaries, as previously discussed on the origin of anisotropy of grain growth due to the migration of {110} plane-matching boundaries in Fe-3z%Si alloy. The most recent theoretical work on the distribution of plane-matching boundaries in solids with different crystal structures was found to be useful for the understanding of nucleation and growth during α/γ phase transformation.展开更多
Chinese President Jiang Zemin told visiting Egptian President Hosni Mubarak on April 21 that China values the positive role Egypt has been playing in the peace process. Mubarak, who flew in for a three-day visit, brie...Chinese President Jiang Zemin told visiting Egptian President Hosni Mubarak on April 21 that China values the positive role Egypt has been playing in the peace process. Mubarak, who flew in for a three-day visit, brief Jiang on the Israel-PLO negotiations and the developments in the Middle East peace process.展开更多
文摘学生理解学科内容并将其转化为智能的最好方式之一,是"参与"到具体问题情境中学习,而精心设计的教育游戏可提供更加真实的"问题情境",有效增强"参与度"。本文在对Conceptual Play Spaces理论分析前提下,理清教育游戏"概念性玩耍空间"的设计要素,基此提出探究式教育游戏的情境设计,促使学生沉浸于丰富的情境,并有效地参与其中,力求使学习"自然发生",实现有意义的学习。
文摘be going to后接动词不定式,多用在口语中,经常用来表示说话人的意图、打算,也可以表示计划、安排等。虽然be going to用法颇多,但在用法上也有一定限制。下面谈谈be going to的具体用法。1.be going to表示主观意图、打算或准备做某事。例如:I’m going to play basketball this afternoon.我打算今天下午打篮球。
文摘The character of Hamlet is evidently designed by its illustrious author as a picture of an amiable prince, an affectionate son, a fast friend, and a fine gentleman. Yet in no one of these respects is it by any means intitled to our approbation. From the beginning of the play till his killing the king at the end of the fifth act we find him irresolute, unnatural, inconstant, melancholy and brutal. That Hamlet’s character, thus formed by nature, and thus modelled by situation, is often variable and uncertain. I will content myself with the supposition that this is the very character which Shakespeare meant to allot him.
文摘Cotton(Gossypium hirsutum L.) fibers,one of the most important natural raw materials for the textile industry,are highly elongated trichomes from epidermal cells of cotton ovules.Among the longest plant cells ever characterized,cotton fiber is an ideal system for studying plant cell elongation.
文摘Marine geology is one of the important mainstays in marine sciences.Since themiddle of this century,due to inumerable systematic investigations,especially the appli-cation of advanced science and technology of various kinds,there has emerged a series ofimportant discoveries in the study of marine geology.These discoveries,while makingcertain traditional basic concepts and theories of geology questionable,led to the birth ofa number of new theories.For example,the discovery of changes in the paleooceanic en-
文摘In-situ observations on α/γ phase transformation were made to study the effects of grain boundary microstructures on the formation of a new phase and the migration of α/γ interphase boundary in an iron4. 2%Cr alloy. It was found that triple junctions with more random boundaries could be the primary nucleation sites for a new phase, while triple junctions with low angle or low ∑ coincidence boundaries did not play any role as preferential sites. The migration of α/γ interphase boundary during heating over the transformation temperature range showed the two stage behaviour characterized by a stage with a migration velocity of 0. 33-0. 75 mm/s and secondly by a stage with 3. 7-7. 6 mm/s. It was also found that abnormal grain growth and a high density of ∑3 coincidence boundaries could occur in a phase with bcc structure after cycling of α/γ phase transformation. A new mechanism of nucleation and growth of a new phase in α/γ phase transformation is proposed on the basis of roles of plane-matching interphase boundaries, as previously discussed on the origin of anisotropy of grain growth due to the migration of {110} plane-matching boundaries in Fe-3z%Si alloy. The most recent theoretical work on the distribution of plane-matching boundaries in solids with different crystal structures was found to be useful for the understanding of nucleation and growth during α/γ phase transformation.
文摘Chinese President Jiang Zemin told visiting Egptian President Hosni Mubarak on April 21 that China values the positive role Egypt has been playing in the peace process. Mubarak, who flew in for a three-day visit, brief Jiang on the Israel-PLO negotiations and the developments in the Middle East peace process.
