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【单选题】
听力原文:Jackit: Will you come round the back, please? The front door's blocked at the moment. Gwen. Hello, I'm Gwen Jenkins. I live two doors down at Number 111. Jackit: Oh, I'm sorry. I didn't recognise you. We only moved in a month ago, so we're no really familiar with many faces around here yet. I'm Jackie Price, by the way. We're in the middle of house alterations. It's going to take longer than we thought. I don' t know when we'll finish it all. Gwen: Well actually, that's what I've come to talk to you about. Jackit: Oh, I see. Shall we go inside then? Please excuse the mess! I'll just turn the TV off. I've been watching that women's keep-fit programme on BBC 1. I've been doing the exercises to music so now I think I'll have a rest! Gwen: I'm afraid I've come to complain. Jackit: Oh, dear. Was the programme on too loud? I've had the windows open to try to get rid of the dust. I'll close them if you like. Gwen: No, it's not that. It's the crashing and banging. The baby can't sleep, my teenage daughter can't hear her records and my nerves are getting bad. My husband's a bit deaf so the noise doesn't bother him much, though I think we'll all be deaf soon if it goes on. Jackit: Oh, I'm sorry about the noise. We're knocking down a wall to enlarge the kitchen. They're so tiny in these houses and we need a more spacious kitchen to eat in. I only wish you'd mentioned it before. As the house next door is empty we didn't think we were disturbing anyone. What's the Gwen's purposes in talking to Jackit ?
A.
Badly built.
B.
Very dirty.
C.
In disorder.
D.
Very clean.
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【单选题】在常温下,锗二极管的死区电压约为()V
A.
0.1
B.
0.3
C.
0.5
D.
0.7
【简答题】在常温下,硅二极管的死区电压约为 V ,导通后在较大电流下的正向压降约为 V ;锗二极管的死区电压约为 V ,导通后在较大电流下的正向压降约为 V 。
【多选题】在常温下,硅二极管的死区电压约为 V,导通后在较大电流下的正向压降约为 V,锗二极管的死区电压约为 V,导通后在较大电流下的正向压降约为 V。
A.
0.5
B.
0.7
C.
0.1
D.
0.2
【简答题】在常温下,硅二极管的死区电压约为 V,导通后正向压降约为 V ;锗二极管的死区电压约为 V,导通后正向压降约为 V。
【判断题】词的音阶对词的美感很重要。
A.
正确
B.
错误
【简答题】在常温下,硅二极管的死区电压约为 V,导通正向压降约为 V;锗二极管的死区电压约为 V,导通后的正向压降约为 V。
【单选题】在常温下,锗二极管死区电压约为(  )。
A.
0.1V;
B.
0.3V;
C.
0.5V;
D.
0.7V;
【简答题】在常温下,硅二极管的死区电压约为 0.5V ,导通后正向压降约为 0.6 ~ 0.8V ;锗二极管的死区电压约为 0.1V ,导通后正向压降约为 。
【判断题】词的音阶对表现词的美感很重要。()
A.
正确
B.
错误
【判断题】风险评估位于项目生命周期的第三阶段。
A.
正确
B.
错误
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