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[音频]Waiter: Good evening, sir. Do you have a reservation?Customer: Well, I’m afraid not .W: I’m very sorry. There are no tables __1now. Would you mind waiting for a minute?C: No. I don’t mind.W: Do you prefer the smoking or the non-smoking_2__, or whatever comes first?C: Whatever comes first.W: OK, please take a seat.(15 minutes later)W: Sorry to keep you waiting, sir. Now we have tables available in the non-smoking section. Thisway, please.C: Thank you. Can you _3__ the menu, please ?W: Here it is. Are you ready to _4____ now ?C: Yes. What kind of drink do you have for an aperitif?W: I recommend red wine.C: Then a glass of red wine. What is the specialty of the house?

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[音频]You know I like my chicken friedCold beer on a Friday nightA pair of jeans that fit just rightAnd the radio upWell I was raised up beneath the shade of a Georgia pineAnd that's home you knowSweet tea pecan pie and homemade wineWhere the (1) growAnd my house it's not much to (2) _____

GTO门极驱动电路由_，，__三个电路组成。

GTO门极加正触发使其_，门极加负触发使其_。

A. 导通导通
B. 导通关断
C. 关断关断
D. 关断导通

下列属于全控性器件的是_________:

A. 单结晶体管
B. SCR
C. 双向晶闸管
D. GTO