【单选题】A tympanic thermometer is used to _______
A.
Take a patient's temperature in the ear
B.
Take a patient's temperature in the mouth
C.
Take a patient's pulse
【单选题】perforation of the tympanic membrane will induce
C.
hearing loss for high-frequency sound
D.
hearing loss for low-frequency sound
【单选题】Which of following is the floor of the tympanic cavity?
【简答题】什么是中断?什么是中断源?51单片机一共有几个中断源?
【单选题】perforation of the tympanic membrane will induce
C.
hearing loss for high-frequency sound
D.
hearing loss for low-frequency sound
【单选题】80C51系列单片机是一个多中断源的单片机,一共有3类()个中断源。
【单选题】MCS-51单片机共有5个中断入口地址,在同一时间里,当5个中断源同时发出中断请求后,程序计数器PC的内容是( )