问答题
用模拟万用表的欧姆挡检测三极管,测定结果如下:
(1) RB-E=低,RE-B=低,RB-C=低,RC-B=高,RC-E=高,RE-C=高,晶体管能正常工作吗?为什么?
(2) RB-E=高, RE-B =低, RB-C =低, RC-B =高, RC-E =高, RE-C =低,晶体管能正常工作吗?为什么?
用模拟万用表的欧姆挡检测三极管,测定结果如下:
(1) RB-E=低,RE-B=低,RB-C=低,RC-B=高,RC-E=高,RE-C=高,晶体管能正常工作吗?为什么?
(2) RB-E=高, RE-B =低, RB-C =低, RC-B =高, RC-E =高, RE-C =低,晶体管能正常工作吗?为什么?
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单项选择题
What is not required in the exchanges of project correspondence?
What is not required in the exchanges of project correspondence?
A.A direct and concise writing style
B.Description of personal emotions in letters
C.Avoidance of wrong spelling in writing
D.Prompt response