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【判断题】
对连续周期信号取样所得的离散时间序列也是周期信号。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Mini-skirts first in __________the 1960s.
A.
caught on
B.
caught in
C.
caught out
D.
caught up
【单选题】The thief missed __ and __.
A.
to be caught; to break away
B.
being caught; breaking away
C.
to be caught; broke away
D.
being caught; broke away
【单选题】Mini-skirts first_____in the 1960s.(2012-68)
A.
caught on
B.
caught in
C.
caught out
D.
caught up
【单选题】、 P2=~(0x01<
A.
左移1位
B.
移位后取反
C.
取反后只有一个为低电平
D.
左移i位后取反
【单选题】Mini-skirts first______in the 1960s.
A.
caught out
B.
caught in
C.
caught on
D.
caught up
【单选题】The boy () a cigarette in the bathroom by his mother.
A.
caught smoking
B.
was caught smoking
C.
caught to smoke
D.
was caught to smoke
【单选题】在IpV4中,广播到网内所有的主机的IP地址是()。
A.
255.0.0.0
B.
255.255.255.255
C.
255.255.0.0
D.
255.255.255.0
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