【简答题】在PN结两端加电压,称为给PN结加偏置,如果使P接电源____,N接电源 ____极,称之为加正向偏置;当PN结加____时导通,加____时截止,这就是PN结的____性。
【单选题】What do we know about Frans de Waal?
A.
He spent a lot of time observing Jenny at the London Zoo in his childhood.
B.
He delivered Tanner Lectures for human values at Emory University.
C.
He is a Dutch-born psychologist, ethnologist and primatologist.
D.
He supports Darwin's opinion to some extent.
【判断题】硅光电二极管在没有光照的时候,若给PN结加上一个适当的反向电压,此电压将加强内建电场,使PN结的耗尽区拉宽。
【单选题】提出“认同危机”(Identity crisis)概念的是
【单选题】Which statement would Frans de Waal most probably agree to?
A.
Bonobos are not as concerned about each other as chimps.
B.
Atheists would like to emulate the harmony among Bonobos.
C.
Bonobos are a good example to show where morality comes from.
D.
Atheists are a group of people who are lack of moral standards.
【单选题】在给PN结加正向电压时_________。