【单选题】【消耗次数：1】
PI控制规律指的是（）
①
比例、微分控制
②
比例、积分控制
③
积分、微分控制
④
比例、微分、积分控制
参考答案：
复制
纠错
相关题目
【单选题】
广义对象控制通道时间常数较大和容积迟延较大时，应引入微分动作，如工艺允许有残差，可选用比例微分，如工艺要求无残差，选（）。
①
位式控制规律
②
PI控制规律
③
P控制规律
④
PID控制规律
随机题目
【单选题】
1.Everyone is working harder and living a happier life now, ____ ？
①
aren’t they
②
aren’t we
③
isn’t it
④
isn’t one
【单选题】
-Hi, haven’t seen you for ages! You look fine! -____. You look well, too.
①
Great
②
Thanks
③
Oh, no
④
Not at all
【单选题】
It is ____for people to feel excited when they start doing something new.
①
normal
②
ordinary
③
average
④
regular
【单选题】
Only when you have acquired a good knowledge of grammar ____ write correctly.?
①
can you ?
②
will you ?
③
you can ?
④
can’t you?
【单选题】
He was offered $20,000 for the picture of his but he ____ it _____.
①
turned…up
②
turned ….off
③
turned ….out
④
turned …down
【单选题】
Helen, if someone comes to see me this morning, ask him to leave a_____. ?
①
word ?
②
notice ?
③
message ?
④
mail ?
【单选题】
28. If it ____ fine tomorrow, we will go skating.
①
will be
②
is to be
③
is going to be
④
is
【单选题】
She
doesn’t speak ____ her friend, but her written work is excellent.
①
as
well as
②
so often as
③
so
much as
④
as
good as
【单选题】
21. Thinking that you know ____ in fact you don’t is a disastrous mistake.
①
what
②
that
③
when
④
however