【判断题】【消耗次数：1】
系统的频率响应是指线性系统在正弦信号作用下的稳态输出。（）
①
正确
②
错误
参考答案：
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相关题目
【单选题】
关于线性系统稳态误差，正确的说法是：（）
①
一型系统在跟踪斜坡输入信号时无误差；
②
稳态误差计算的通用公式是；
③
增大系统开环增益K可以减小稳态误差；
④
增加积分环节可以消除稳态误差，而且不会影响系统稳定性。
【单选题】
关于线性系统稳态误差，正确的说法是：（）
①
一型系统在跟踪斜坡输入信号时无误差；
②
稳态误差计算的通用公式是<imgwidth="144"height="47"src="../uploadfiles/word/zdkzll002.files/image035.png">；
③
增大系统开环增益K可以减小稳态误差；
④
增加积分环节可以消除稳态误差，而且不会影响系统稳定性。
随机题目
【单选题】
I won’t apply for the job. I hear that they’re quite ____
about their personnel.
①
particular
②
especially
③
special
④
peculiar
【单选题】
His manner was so pleasant that Bolla felt at ____ with him at once.
①
peace
②
large
③
ease
④
best
【单选题】
Research findings show we spend about two hours dreaming every night, no matter what we _________ during the day.
①
must have done
②
would have done
③
should have done
④
may have done
【单选题】
Joseph was very lucky ____ with his life; he almost did not get out of the room.
①
to escape
②
to have escaped
③
to escaping
④
to be escaping
【单选题】
The rescue team must have searched for the missing visitors
two days ago, _____?
①
mustn’ t they
②
haven’ t they
③
didn’ t they
④
hadn’ t they
【单选题】
____ is announced in the papers, our country has
launched a large scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
①
What
②
As
③
Which
④
That
【单选题】
The ____ crown jewels are kept in the Tower of London.
①
valued
②
valueless
③
invaluable
④
usable
【单选题】
Though ____ rich, she was better off than at any other period in her life.
①
by means of
②
within her means
③
by all means
④
by no means