在电力电子电路中,GTR工作在开关状态,即工作在截止区或饱和区。
查看答案
晶闸管可以通过在门极施加负的脉冲电流使其关断。
A. 对
B. 错
某晶闸管的额定电流为200A,额定电压为500V,则该晶闸管的型号为____。
Questions 1 and 2 are based on the news report you have just heard.[音频]
A. Enrol him in a Newcastle football club.
B. Send him to an after-school art class.
C. Forbid him to draw in his workbook
D. Help him post his drawings online.
Questions 2 are based on the news report you have just heard.
A. Contacted Joe to decorate its dining-room.
B. Hired Joe to paint all the walls of its buildings.
C. Renovated its kitchen and all the dining-rooms.
D. Asked Joe for permission to use his online drawings
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