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【单选题】
频率较低的电磁波趋于沿弯曲的地球表面传播,有一定的绕射能力。这种传播方式称为( )
A.
地波传播
B.
天波传播
C.
视 距 传播
D.
散射传播
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【单选题】下列符号中可以用做C++标识符的是()。
A.
_radius
B.
foo~bar
C.
else
D.
3room
【简答题】听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标 在试卷的相应位置。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对 话仅读一遍。 1. Who's the man's favorite actor? A. Andy Lau B. Jay Chou C. Jackie Chan 2. How many kids lost their ...
【单选题】假设一反相器和两输入与非门中的器件PMOS与NMOS的尺寸比为2,最小尺寸的对称反相器的输入电容等于最小尺寸NMOS管栅电容的3倍。若该NAND门的等效电阻等于该反相器的电阻,那么它的逻辑努力(logical effort)为()。
A.
2/3
B.
1
C.
4/3
D.
5/3
【单选题】下列符号中可以用做 C++标识符的是( )
A.
_radius
B.
f00~bar
C.
else
D.
3room
【单选题】Jackie lives in a _____.
A.
a house in Mexico city
B.
a small house with four bedrooms
C.
a house with three different rooms an a kitchen
D.
a place with six rooms
【简答题】逻辑努力(logical effort)表示一个门与一个反相器提供相同的输出电流时它所表现出的 比反相器大多少。
【判断题】51单片机的中断源全部编程设定为同级时,优先级最高的是INT1。
A.
正确
B.
错误
【单选题】Jackie lives in a small _______ .
A.
dorm
B.
house
C.
apartment
【简答题】完形填空。 I have a good friend.  His name is Sonny. He l Sydney , Australia. Now he lives in Beijing with his parents. He's 14 2 and his birthday is 3 October. He speaks English and he 4 speaks 5 Chinese....
【简答题】Jackie is a student in a vocational school, he lives a busy life every day. He usually gets up at twenty to seven. Then he has breakfast at about seven o'clock. After breakfast, he hurries to school. ...
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