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【多选题】
如果计入表面态的影响,当表面态为施主态,且态密度足够大时,关于结能带结构的描述,正确的是?A.
此时结界面两边的状态完全由界面态电荷决定，与功函数等没有关系。
B.
对于 n 型半导体，在半导体表面形成很薄的多子积累层。
C.
对于p 型半导体，在半导体表面形成很薄的多子积累层。
D.
对于 p 型半导体，在半导体表面形成很厚的耗尽层。
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皮皮学刷刷变学霸
举一反三
【单选题】Which club has Mary already joined?
A.
Student Union.
B.
Geology club.
C.
Guitar club.
D.
Accounting society.
【单选题】We all hope ____ scientists. A. become B. to become C. becoming D. became
A.
become
B.
to become
C.
becoming
D.
became
【单选题】--Is Peter a new member in your art club? --No. He _____ our club for two years.
A.
joins
B.
has joined
C.
has been in
【简答题】粮食类原料在烹饪中的应用如何?
【单选题】It _____ more than half a year since I _____ a teacher. [ ]
A.
is, become
B.
was, become
C.
is, became
D.
has been, becomes
【简答题】The ______ (member) of the club has now increased to a total of 800.
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