【单选题】【消耗次数：1】
当8051单片机的TCON寄存器的IT0控制位为1时，外部中断0的触发信号为。
①
低电平信号
②
高电平信号
③
下降沿信号
④
上升沿信号
参考答案：
复制
纠错
相关题目
【单选题】
当8051单片机TMOD寄存器的GATE位为1时，表示。
①
定时/计数器为计数工作方式
②
定时/计数器为定时工作方式
③
定时/计数器为暂停工作方式
④
定时/计数器为门控工作方式
随机题目
【单选题】
He didnt seem to mind_____the music while he was studying.
①
them listening
②
them to listen to
③
when she returned
④
that did she return
【单选题】
_____all the representatives still not there,the meeting was postponed for several hours.
①
Because
②
With
③
By
④
Without
【单选题】
Ive been telling you_____not to do that,but you neve listened to me.Thats why you got into trouble.
①
at times
②
time before time
③
time and again
④
for the time being
【单选题】
It seems as if the sun_____round the earth since it rises in the east and sets in the west.
①
circles
②
is circling
③
has been circling
④
were circling
【单选题】
If he_____the storekeepers scissors,he would have forgotten to buy a pair.
①
would not see
②
had not seen
③
having not seen
④
has not seen
【单选题】
It was not until she had finished all her work_____.
①
did she return
②
that she returned
③
when she returned
④
that did she return
【单选题】
Being extremely_____to the cold,I do not like skating.
①
sensitive
②
senseless
③
insensitive
④
sensible