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【单选题】
关于光敏二极管和光敏三极管，下列说法错误的是（ ）。A.
光敏三极管的光电流比光敏二极管大的多。
B.
光敏三极管的响应时间比光敏二极管长的多。
C.
光敏三极管的线性特性比光敏二极管差。
D.
光敏三极管的暗电流比光敏二极管大的多。
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【简答题】Semantic change plays a very important role in widening the vocabulary of a language.
【单选题】What does the author imply about institutional politics?
A.
Institutional politics has been a challenge for many disciplines.
B.
Active involvement in institutional politics promotes pathology.
C.
Pathologists should have nothing to do with institutional politics.
D.
Administrators should put more emphasis on institutional politics.
【简答题】institutional
【多选题】Which of the following are causes of language change?
A.
rapid development of science and technology
B.
social and political needs
C.
feminism
D.
children language acquistion
E.
economy of memory
F.
regularization of exceptional forms
G.
theory of least effort
【简答题】For many patients, institutional care is the most ________ and beneficial form. of care. A) persistent B) appropriate C) thoughtful D) sufficient
【简答题】A institutional B universal C fundamental D instrumental
【单选题】完整的风化壳沿垂直剖面由上及下可分为土壤层、()、()和 ()。
A.
残积层、半风化层、基岩层
B.
半风化层、残积层、基岩层
C.
半风化层、基岩层、残积层
D.
残积层、基岩层、半风化层
【判断题】Institutional advertising focuses on individual products while product advertising is used to create a positive image for an organization.()
A.
正确
B.
错误
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