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【简答题】
基尔霍夫电流定律指出:时刻,电路中节点处 ( ) 代数和( ),其数学表达式为( );基尔霍夫电压定律指出, 时刻,沿 电路的闭合回路,各段( )的( )为零,其数学表达式为( )。
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【简答题】A．The library is in the busiest part of the city. B．The library has grass and trees around it. C．The roof of the Main Reading Room is 41 feet high. D．Its rooms are very large.
【简答题】空调系统中的发动机转速检测电路的转速信号来自( )
【简答题】PN 结形成后,在其内部就形成了一个内 [ ] ,其方向是由 [ ] 区指向 [ ] 区。
【单选题】Which of the following statements is true of libraries in the UK?
A.
The library is sacrificing books in favor of internet access and other facilities.
B.
More and more people go to the library reading a book.
C.
There are more and more computers in the library to facilitate the book index for the readers.
D.
The number of the booking in the library has increased.
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