【简答题】当定时/计数器选定为定时器方式时,是对()进行计数,选定为计数器方式时,是对()进行计数。
【单选题】The two fishermen saw ___________ in the sky while they were fishing by a river.
【单选题】A big whale was caught ________the coast by two fishermen.
【判断题】当对机器周期进行计数时,定时计数器作为定时器用。
【单选题】如果单片机的晶振是12MHz,当定时计数器做定时功能时,定时器内部计数器,每计一个数的时间是( )
【单选题】Two fishermen saw ___in the sky while they were fishing by a lake.
【单选题】适航规章要求,化学氧气发生器应至少保证多长时间的供氧:
【简答题】适航规章要求,化学氧气发生器应至少保证多长时间的供氧() A12分钟 B30分钟 C60分钟 D90分钟
【单选题】___ took pictures of the two fishermen.
A.
The creatures in a UFO
B.
A driver of a police car