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【单选题】
听力原文:M: Did you take these pictures? They're very good. W: Yes, I think they turned out well, too. I like to take my camera with me wherever I go. That way, if I see something interesting, I can snap a picture of it. M: Carrying a big camera around is too much trouble for me. W: My camera is really small, though. Here, let me show you. M: That is a compact camera. But you really must know a lot about photography to get such professional looking results. W: Not necessarily. This camera is simple to operate. M: Does this model come with a flash attachment for indoor shots? W: Better than that. It has a built - in electronic flash, and focusing. M: That's what I need. When I take pictures they usually come out blurry because I don' t adjust the lenses popery, and I hate photos that are out of focus. Is a camera like yours very expensive? W: Less than you'd expect. Why don't you check the prices at Hatfield's down the street? This model was on sale there last week. M: I think I will. It certainly won't hurt to take a look. (23)
A.
Looking at some photographs.
B.
Selling cameras.
C.
Teaching a photography class
D.
Repairing camera equipment.
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【单选题】下列有关电流参考方向的叙述正确的是( )
A.
电流的参考方向是正电荷移动的方向
B.
电流的参考方向是人为任意假定的方向
C.
电流的参考方向就是电流的实际流向
D.
电流的参考方向是负电荷移动的方向
【单选题】下列有关电流参考方向的叙述正确的是( )
A.
电流的参考方向是负电荷移动的方向
B.
电流的参考方向就是电流的实际流向
C.
电流的参考方向是正电荷移动的方向
D.
电流的参考方向是人为任意假定的方向
【单选题】下面程序运行的结果是:Falseand(FalseorTrue)
A.
False
B.
True
C.
程序报错
D.
0
【判断题】第二 类线性相位FIR滤波器,幅度函数在 处是奇对称
A.
正确
B.
错误
【单选题】下列有关电流参考方向的叙述正确的是()
A.
电流的参考方向是正电荷移动的方向
B.
电流的参考方向是负电荷移动的方向
C.
电流的参考方向是人为任意假定的方向
D.
电流的参考方向就是电流的实际流向
【判断题】第二 类线性相位FIR滤波器,幅度函数在 处是偶对称
A.
正确
B.
错误
【单选题】下面程序运行的结果是:(FalseandFalse)orTrue
A.
True
B.
False
C.
0
D.
程序报错
【单选题】下列有关电流参考方向的叙述正确的是( )
A.
电流的参考方向是人为任意假定的方向
B.
电流的参考方向是负电荷移动的方向
C.
电流的参考方向就是电流的实际流向
D.
电流的参考方向是正电荷移动的方向
【单选题】下列有关电流参考方向的叙述正确的是( )
A.
电流的参考方向是人为任意假定的方向
B.
电流的参考方向是正电荷移动的方向
C.
电流的参考方向就是电流的实际流向
D.
电流的参考方向是负电荷移动的方向
【单选题】下面程序运行的结果是:FalseandFalseorTrue
A.
True
B.
False
C.
程序报错
D.
0
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