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【多选题】
按自变量 t 取值的连续与否来分,信号有( )时间信号与( )时间信号之分。A.
连续
B.
离散
C.
周期
D.
非周期
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【简答题】A．There is a lack of jobs available for artistic people. B．There are so many top-level jobs available. C．There are so many people out of work. D．The job history is considered to be a work of art.
【判断题】Anencephaly is a congenital condition in which there is a lack of development of the brain.
A.
正确
B.
错误
【简答题】There is a lack of communication disciplines.
【简答题】A．There is a lack of jobs available for artistic people. B．There are so many top-level jobs available. C．There are so many people out of work. D．The job history is considered to be a Work of art.
【简答题】People living in the area where there is a lack of electricity often keep a supply of candles ________power failure. A．in case of B．once C．even if D．in course of
【单选题】There is a lack of consistency between ____ and pronunciation in English.
A.
spelling
B.
writing
C.
listening
D.
meaning
【简答题】在Word中，当前标题内容文档名是“文档1”时，表明这是一个从未保存过的文档。
【简答题】A．There is a lack of artistic environment. B．It is a lonely place. C．There is a lack of snow. D．You can get refreshed at the beach.
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