利用金扩散,是因为金在硅中主要起复合中心的作用,可以减少少子寿命,提高器件的开关速度。
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Is he a friend of yours?
A. 对
B. 错
This is Betty’s room, the plumber's daughter.
A. 对
B. 错
I am fond of pictorials of children.
A. 对
B. 错
I went to the teacher for a piece of advice about my study.
A. 对
B. 错