从网页上查的也行，不过一定是要读后感，不是内容也不是简介。
Investigation from a web page is also ok, but must be to book review, not the content nor the Introduction.
固态物理提供一个固态量子理论的基本观念的简介。本网页提供了相当深入的作业习题。
Physics of solids I provides an introduction to the basic concepts of the quantum theory of solids. This website features comprehensive problem sets.
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