古典诗歌登高主题群文阅读的三个角度

登高是古典诗歌的经典主题。在语文教学中,登高可以作为古典诗歌群文阅读的着眼点。具体来看,登高主题古典诗歌群文阅读可以从三个角度切入。首先,登高具有双重性质,既是物理层面的位移,也是精神层面的上升;其次,登高具有张力属性,诗人在客观不遇的现实与渴求出仕的愿望之间形成了矛盾;最后,在时间线索上,不同时期的登高往往展现了诗人不同的心境与时代风貌。

From liquid metal to stretchable electronics:Overcoming the surface tension

The field of stretchable electronics mainly includes electronic products conformal with tissues,being integrated into skin or clothing.Since these products need to work during deformation,their requirements for materials focus on stretchability and conductivity.Liquid metals are excellent materials with these properties.However,liquid metals have extremely high surface tension at room temperature,which will spontaneously form a spherical shape and are difficult to form the shape required by stretchable devices,which is the biggest obstacle to their development in this emerging field.Therefore,the emphasis is placed on the principle of overcoming the high surface tension in this review,and various methods of using liquid metals to fabricate stretchable electronic devices based on these principles have been linked.Liquid metals show promise in the convenience of sensing,energy harvesting,etc.The existing challenges and opportunities are also discussed here.