【单选题】______ wonderful experience! [ ]
【多选题】关于本征半导体和杂质半导体描述正确的是
D.
掺杂过程中,五价元素称为施主杂质,三价元素称为受主杂质
【简答题】In what area does he lack experience? He has no experience in_________
【简答题】What qualities and experience will you need to _______ for the job?
【单选题】以下函数可把一个数组合并为一个字符串的是?
【单选题】— _______ wonderful experience! —So it was. [ ]
【判断题】本征半导体中掺入适量的施主杂质可以形成P型半导体。( )
【单选题】what experience do you have?
A.
: My major is Business Administration.
B.
: Yes. I received my Bachelor degree in English Literature.
C.
: Project Management.I was very interested in this course when I was a student.
D.
: I worked in a foreign office for one year.
E.
. I like to be paid more than 5000 yuan.
F.
I would rather work full-time.
【单选题】N型半导体,是在本征半导体里加入( )价元素杂质
【简答题】下述说法中,正确的是( ). A.本征半导体是电子与空穴两种载流子同时参与导电.而杂质半导体(N型或P型)只有一种载流子(电子或空穴)参与导电,所以本征半导体导电性能比杂质半导体好 B.N型半导体的导电性能优于P型半导体,因为N型半导体是负电子导电,P型半导体是正离子导电 C.N型半导体中杂质原子所形成的局部能级靠近导带的底部,使局部能级中多余的电子容易被激发跃迁到导带中去.大大提高了半导体...