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【简答题】
某LTI离散系统，已知当激励为题1．30图 (a)所示的信号fl(k)[即单位序列δ(k)]时，其零状态响应如题1．30图 (b)所示。求： [*] 题1．30图 (1)当激励为题1．30图 (c)的信号f2(k)时，系统的零状态响应； (2)当激励为题1．30图 (d)的信号f3(k)时，系统的零状态响应。
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举一反三
【单选题】What the witness said in court was not with the statement he made to the police.
A.
relevant
B.
prevalent
C.
consistent
D.
coincident
【单选题】听力原文： Mr. Smith was a wealthy industrialist, lint he was not satisfied with life. He did not sleep well and his food did not agree with him. This situation lasted for some time. Finally, after several...
A.
To eat less.
B.
To have more exercises.
C.
To change his surroundings.
D.
To forget about his business.
【单选题】He said he was not optimistic the future of that country.
A.
of
B.
with
C.
on
D.
about
【单选题】He was not content with the wage, so he said to the manager,"if I don't get a pay rise I'll ______."
A.
stop
B.
quit
C.
leave
D.
go
【简答题】首列车车站根据行调通报列车位置及( )判明区间是否空闲;后续列车凭前次列车( )作为区间空闲的凭证。
【简答题】首列车车站根据行调通报（）位置及（）判明区间是否空闲，位置不清时，值班员应及时向行调核对。
【单选题】He said he was __________ angry with me, but I was not sure about it.
A.
no more
B.
not more
C.
not any more
D.
not longer
【单选题】He said he was __________ angry with me, but I was not sure about it.
A.
no more
B.
not any more
C.
not more
D.
not longer
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