最佳答案:Li hua want to suggest how to learn Chinese jack written
最佳答案:Newtonian classical opticsBohr's atom modelEinstein's limit of light speed
最佳答案:I have long engaged mainly in the two courses in the teaching and administrative
最佳答案:abstract抽象的概念an abstract concept;不要这样抽象地谈问题.Don't speak in such abstract terms.