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【判断题】
如果 x (t) 是有限持续信号,且绝对可积,则 X (s) 收敛域是整个 s 平面。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】He gave us another piece of advice, _____ of great help to the research work. [ ]
A.
which I think is
B.
which I think it is
C.
I think which is
D.
I think it is
【简答题】因PN结具有 性,当PN结正向偏置时,内、外电场方向 ,PN结反向偏置时,其内、外电场方向 。
【单选题】he one pleasure that Einstein ____ his great fame was the ability it gave him to help others.
A.
resulted from
B.
stirred up
C.
turned out
D.
derived from
【单选题】He gave a great performance, but he was very_________.
A.
arrogant
B.
inferior
C.
superior
D.
humble
【单选题】It was the information that he accumulated there ______ gave him great help．
A.
was
B.
what
C.
that
D.
1ater
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