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【简答题】
若自由电子矢量K满足以为晶格周期性边界条件Ψ（x）=Ψ（x+L）和定态薛定谔方程。试证明下式成立：
eiKL=1
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参考答案：
举一反三
【单选题】Computer programmers often remark that computing machines, with a perfect lack of discrimination, will do any foolish thing they are told to do. The reason for this lies, of course, in the narrow fixa...
A.
Practical for scientific purposes
B.
Detrimental to scientific progress
C.
Unimportant in most situations
D.
Expedient, but of little long-term value
相关题目：
【单选题】Computer programmers often remark that computing machines, with a perfect lack of discrimination, will do any foolish thing they are told to do. The reason for this lies, of course, in the narrow fixa...
A.
Practical for scientific purposes
B.
Detrimental to scientific progress
C.
Unimportant in most situations
D.
Expedient, but of little long-term value
参考解析：
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