定时器/计数器在什么情况下是定时器?在什么情况下是计数器?
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已知FOSC=6MHZ,试编写程序,使P1.7输出高电平宽40us,低电平宽360us的连续矩形脉冲。
单选Which of the following means nose inflammation?( )
A. laryngitis
B. bronchitis
C. rhinitis
D. gastritis
单选Which of the following means paralysis of the voice box?( )
A. laryngitis
B. laryngoplegia
C. laryngoplasty
D. laryngospasm