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【单选题】
十六进制数1A2H对应的十进制数是
A.
418
B.
308
C.
208
D.
578
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【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.
A.
something strange
B.
anything strange
C.
strange something
D.
strange anything
【单选题】A big whale was caught ________the coast by two fishermen.
A.
along
B.
on
C.
across
D.
off
【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。
A.
正确
B.
错误
【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( )
A.
1s
B.
1ms
C.
1us
D.
12us
【单选题】Two fishermen saw ___in the sky while they were fishing by a lake.
A.
something strange
B.
anything strange
C.
strange something
D.
strange anything
【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:
A.
12 分钟
B.
30 分钟
C.
60 分钟
D.
90 分钟
【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
【简答题】5种碱基的名称和简写分别为
【单选题】___ took pictures of the two fishermen.
A.
The creatures in a UFO
B.
A driver of a police car
C.
A pilot of a plane
D.
Captain Ed Mitchell
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