如果系统的幅频响应对所有的均为常数，则称该系统为____
更新时间:2023/7/3 19:47:00
出自:石家庄铁道大学信号与系统
已知序列为周期序列，其周期为2。
×
√
更新时间:2023/7/3 19:46:00
出自:石家庄铁道大学信号与系统
零状态响应是自由响应的一部分。
×
√
更新时间:2023/7/3 19:46:00
出自:石家庄铁道大学信号与系统
下列说法中属于傅里叶变换的卷积定理的是（）
A、 列写特征方程,根据特征方程得到特征根,根据特征根得到齐次解的表达式
B、 根据激励函数的形式,设特解函数的形式,将特解代入原微分方程,求出待定系数得到特解的具体值
C、 得到微分方程全
更新时间:2023/7/3 19:46:00
出自:石家庄铁道大学信号与系统
零输入响应就是由输入信号产生的响应。
×
√
更新时间:2023/7/3 19:46:00
出自:石家庄铁道大学信号与系统
简述信号的基本运算
更新时间:2023/7/3 19:46:00
出自:石家庄铁道大学信号与系统
离散因果系统的充分必要条件是
A、h(k)=0,k<0
B、h(k)=0 ,k>0
c h(k)<0,k<0
D、h(k)>0 ,k>0
更新时间:2023/7/3 19:45:00
出自:石家庄铁道大学信号与系统
一个系统（连续的或离散的）如果对任意的有界输入，其零状态响应也是有界的则称该系统是有界输入有界输出稳定系统。
×
√
更新时间:2023/7/3 19:43:00
出自:石家庄铁道大学信号与系统
偶函数的傅里叶级数展开式中只有余弦项
×
√
更新时间:2023/7/3 19:43:00
出自:石家庄铁道大学信号与系统
已知f(t)的频带宽度为，则f(2t-4)的频带宽度为（）
A、2
B、1/2
C、 2
D、 2
更新时间:2023/7/3 19:43:00
出自:石家庄铁道大学信号与系统
周期性的连续时间信号,其频谱是离散的、非周期的
×
√
更新时间:2023/7/3 19:42:00
出自:石家庄铁道大学信号与系统
更新时间:2023/7/3 19:42:00
出自:石家庄铁道大学信号与系统
LTI连续系统微分方程经典解的求解过程分几步（）
A、 一步
B、 两步
C、 三步
D、 四步
更新时间:2023/7/3 19:41:00
出自:石家庄铁道大学信号与系统
信号的基本运算有几种（）
A、 1
B、 2
C、 3
D、 4
更新时间:2023/7/3 19:41:00
出自:石家庄铁道大学信号与系统
He_______himself quickly to the new condition of his work.
A、 ch
更新时间:2023/7/3 19:34:00
出自:石家庄铁道大学大学英语Ⅲ
The ________ year begins when school opens in September.
A、 stud
更新时间:2023/7/3 19:32:00
出自:石家庄铁道大学大学英语Ⅲ
____ table tennis was accepted as a regular part of the̳
更新时间:2023/7/3 19:31:00
出自:石家庄铁道大学大学英语Ⅲ
This young woman would have ________ curiosity because she wasQ
更新时间:2023/7/3 19:31:00
出自:石家庄铁道大学大学英语Ⅲ
The refrigerator is_______; we must buy some food.
A、 bare
B、 blank
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
The students find it hard _______ their spoken English.
A、 impro
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
She added that if he had telephone her before lunch, she____the book there.
A、 took
B、 would have taken
C、 would take
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
Our new house is very _____ for me as I can get
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
I like my teacher, but feel no ________ for her.
A、 affect
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
We’ll visit Europe next year ________ we have enough money.
A、 pr
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
When we shook hands I was conscious of his firm _______.
A、
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
The picture is pleasant________.
A、 to look at
B、 to look
C、 to be&#
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
He asked me to get her ________ of blue silk for aQ
更新时间:2023/7/3 16:36:00
出自:石家庄铁道大学大学英语Ⅲ
For this part you are allowed 30 minutes to write a composition of no less than 150 words on Environmental Protection. Y
更新时间:2023/7/3 16:32:00
出自:石家庄铁道大学大学英语Ⅲ
Many of Edith Wharton.s best choices were completed under great personal ___strain.
A、 poverty
B、 privacy
C、 resentme
更新时间:2023/7/3 16:31:00
出自:石家庄铁道大学大学英语Ⅲ
I.ll be amazed _______ Christie doesn.t win.
A、 if
B、 when
C、 as
D、 unles
更新时间:2023/7/3 16:31:00
出自:石家庄铁道大学大学英语Ⅲ
Many cookbooks have very ________ directions.
A、 common
B、 confirmed
更新时间:2023/7/3 16:30:00
出自:石家庄铁道大学大学英语Ⅲ
After a knock at the door, the child heard his mother’s voice ______ him.
A、 calling
B、 called
C、 being called
D、 to
更新时间:2023/7/3 16:30:00
出自:石家庄铁道大学大学英语Ⅲ
She isn’t beautiful. But she is ________ pretty.
A、 kind of̳
更新时间:2023/7/3 16:29:00
出自:石家庄铁道大学大学英语Ⅲ
Not only _____ tolerant of other people?s opinion, but he is
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
_______all we should put the theory into practice.
A、 Beside
B、 To
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
A strong vocabulary can be a valuable asset, both in college and later in your career. Considerable research evidence su
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
_____ some officials, General Batton inspected his army.
A、 Followed
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
In the ________ of the project not being a success, the̳
更新时间:2023/7/3 16:27:00
出自:石家庄铁道大学大学英语Ⅲ
I don’t think this kind of medicine has any_______.
A、 answer
B
更新时间:2023/7/3 16:27:00
出自:石家庄铁道大学大学英语Ⅲ
He said he was a policeman and therefore had the ________
更新时间:2023/7/3 16:26:00
出自:石家庄铁道大学大学英语Ⅲ
In arithmetic, a number _____ for the size of a set of a set of things.
A、 measures
B、 estimates
C、 cancels
D、 repr
更新时间:2023/7/3 16:26:00
出自:石家庄铁道大学大学英语Ⅲ
They are _____ him to a special unit at Great Ormond S
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
Did you tidy your room --- No, I was going to tidy my room but I ______ visitors.
A、 had
B、 have
C、 have had
D、 will
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
After a short holiday, he ____ himself once more to his stud
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
It might be ________ to give your attitude towards study a&#
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
I don.t think your manager has the right to _____ in o
更新时间:2023/7/3 16:22:00
出自:石家庄铁道大学大学英语Ⅲ
Over thirty coal miners were reported ______ in that shocking accident.
A、 to be killed
B、 having been killed
C、 to h
更新时间:2023/7/3 16:21:00
出自:石家庄铁道大学大学英语Ⅲ
She was deaf ____ his request to do her work.
A、 of
B、 to
C、 at
D、 on
更新时间:2023/7/3 16:21:00
出自:石家庄铁道大学大学英语Ⅲ
The country’s first act would be to ________ for the navy.&#
更新时间:2023/7/3 16:20:00
出自:石家庄铁道大学大学英语Ⅲ
_____ of water makes Death Valley a desert, but it is by no means devoid.
A、 Lacking
B、 Being lack
C、 Because of lack
更新时间:2023/7/3 16:18:00
出自:石家庄铁道大学大学英语Ⅲ
He decided to sell his farm and ___ a fresh start in business.
A、 open
B、 make
C、 take
D、 break
更新时间:2023/7/3 16:18:00
出自:石家庄铁道大学大学英语Ⅲ
The students waited patiently _____ the results were being distrib
更新时间:2023/7/3 16:17:00
出自:石家庄铁道大学大学英语Ⅲ
English is the necessary foreign language in our school’s ________
更新时间:2023/7/3 16:17:00
出自:石家庄铁道大学大学英语Ⅲ
It was well known that Thomas Edison_______the electric lamp.
A、 invent
更新时间:2023/7/3 16:16:00
出自:石家庄铁道大学大学英语Ⅲ
Some hotel staff speak ____English.
A、 little
B、 small
C、 few
D、 scarcely
更新时间:2023/7/3 16:15:00
出自:石家庄铁道大学大学英语Ⅲ
The decision _____, what is to be done now is how to&#
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
Once he starts a job, he won’t stop_______it is finished.
A、 till
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
He was always attentive ____ my ideas.
A、 to
B、 with
C、 on
D、 at
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
We consider_______the instrument be adjusted each time it is used.
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
He would not do _____ the doctor advised.
A、 as
B、 so
C、 so as
D、 as
更新时间:2023/7/3 16:13:00
出自:石家庄铁道大学大学英语Ⅲ
目前为：
8/20
页
首页 上页 下页 尾页
更新时间:2023/7/3 19:42:00
出自:石家庄铁道大学信号与系统
LTI连续系统微分方程经典解的求解过程分几步（）
A、 一步
B、 两步
C、 三步
D、 四步
更新时间:2023/7/3 19:41:00
出自:石家庄铁道大学信号与系统
信号的基本运算有几种（）
A、 1
B、 2
C、 3
D、 4
更新时间:2023/7/3 19:41:00
出自:石家庄铁道大学信号与系统
He_______himself quickly to the new condition of his work.
A、 ch
更新时间:2023/7/3 19:34:00
出自:石家庄铁道大学大学英语Ⅲ
The ________ year begins when school opens in September.
A、 stud
更新时间:2023/7/3 19:32:00
出自:石家庄铁道大学大学英语Ⅲ
____ table tennis was accepted as a regular part of the̳
更新时间:2023/7/3 19:31:00
出自:石家庄铁道大学大学英语Ⅲ
This young woman would have ________ curiosity because she wasQ
更新时间:2023/7/3 19:31:00
出自:石家庄铁道大学大学英语Ⅲ
The refrigerator is_______; we must buy some food.
A、 bare
B、 blank
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
The students find it hard _______ their spoken English.
A、 impro
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
She added that if he had telephone her before lunch, she____the book there.
A、 took
B、 would have taken
C、 would take
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
Our new house is very _____ for me as I can get
更新时间:2023/7/3 16:38:00
出自:石家庄铁道大学大学英语Ⅲ
I like my teacher, but feel no ________ for her.
A、 affect
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
We’ll visit Europe next year ________ we have enough money.
A、 pr
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
When we shook hands I was conscious of his firm _______.
A、
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
The picture is pleasant________.
A、 to look at
B、 to look
C、 to be&#
更新时间:2023/7/3 16:37:00
出自:石家庄铁道大学大学英语Ⅲ
He asked me to get her ________ of blue silk for aQ
更新时间:2023/7/3 16:36:00
出自:石家庄铁道大学大学英语Ⅲ
For this part you are allowed 30 minutes to write a composition of no less than 150 words on Environmental Protection. Y
更新时间:2023/7/3 16:32:00
出自:石家庄铁道大学大学英语Ⅲ
Many of Edith Wharton.s best choices were completed under great personal ___strain.
A、 poverty
B、 privacy
C、 resentme
更新时间:2023/7/3 16:31:00
出自:石家庄铁道大学大学英语Ⅲ
I.ll be amazed _______ Christie doesn.t win.
A、 if
B、 when
C、 as
D、 unles
更新时间:2023/7/3 16:31:00
出自:石家庄铁道大学大学英语Ⅲ
Many cookbooks have very ________ directions.
A、 common
B、 confirmed
更新时间:2023/7/3 16:30:00
出自:石家庄铁道大学大学英语Ⅲ
After a knock at the door, the child heard his mother’s voice ______ him.
A、 calling
B、 called
C、 being called
D、 to
更新时间:2023/7/3 16:30:00
出自:石家庄铁道大学大学英语Ⅲ
She isn’t beautiful. But she is ________ pretty.
A、 kind of̳
更新时间:2023/7/3 16:29:00
出自:石家庄铁道大学大学英语Ⅲ
Not only _____ tolerant of other people?s opinion, but he is
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
_______all we should put the theory into practice.
A、 Beside
B、 To
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
A strong vocabulary can be a valuable asset, both in college and later in your career. Considerable research evidence su
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
_____ some officials, General Batton inspected his army.
A、 Followed
更新时间:2023/7/3 16:28:00
出自:石家庄铁道大学大学英语Ⅲ
In the ________ of the project not being a success, the̳
更新时间:2023/7/3 16:27:00
出自:石家庄铁道大学大学英语Ⅲ
I don’t think this kind of medicine has any_______.
A、 answer
B
更新时间:2023/7/3 16:27:00
出自:石家庄铁道大学大学英语Ⅲ
He said he was a policeman and therefore had the ________
更新时间:2023/7/3 16:26:00
出自:石家庄铁道大学大学英语Ⅲ
In arithmetic, a number _____ for the size of a set of a set of things.
A、 measures
B、 estimates
C、 cancels
D、 repr
更新时间:2023/7/3 16:26:00
出自:石家庄铁道大学大学英语Ⅲ
They are _____ him to a special unit at Great Ormond S
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
Did you tidy your room --- No, I was going to tidy my room but I ______ visitors.
A、 had
B、 have
C、 have had
D、 will
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
After a short holiday, he ____ himself once more to his stud
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
It might be ________ to give your attitude towards study a&#
更新时间:2023/7/3 16:23:00
出自:石家庄铁道大学大学英语Ⅲ
I don.t think your manager has the right to _____ in o
更新时间:2023/7/3 16:22:00
出自:石家庄铁道大学大学英语Ⅲ
Over thirty coal miners were reported ______ in that shocking accident.
A、 to be killed
B、 having been killed
C、 to h
更新时间:2023/7/3 16:21:00
出自:石家庄铁道大学大学英语Ⅲ
She was deaf ____ his request to do her work.
A、 of
B、 to
C、 at
D、 on
更新时间:2023/7/3 16:21:00
出自:石家庄铁道大学大学英语Ⅲ
The country’s first act would be to ________ for the navy.&#
更新时间:2023/7/3 16:20:00
出自:石家庄铁道大学大学英语Ⅲ
_____ of water makes Death Valley a desert, but it is by no means devoid.
A、 Lacking
B、 Being lack
C、 Because of lack
更新时间:2023/7/3 16:18:00
出自:石家庄铁道大学大学英语Ⅲ
He decided to sell his farm and ___ a fresh start in business.
A、 open
B、 make
C、 take
D、 break
更新时间:2023/7/3 16:18:00
出自:石家庄铁道大学大学英语Ⅲ
The students waited patiently _____ the results were being distrib
更新时间:2023/7/3 16:17:00
出自:石家庄铁道大学大学英语Ⅲ
English is the necessary foreign language in our school’s ________
更新时间:2023/7/3 16:17:00
出自:石家庄铁道大学大学英语Ⅲ
It was well known that Thomas Edison_______the electric lamp.
A、 invent
更新时间:2023/7/3 16:16:00
出自:石家庄铁道大学大学英语Ⅲ
Some hotel staff speak ____English.
A、 little
B、 small
C、 few
D、 scarcely
更新时间:2023/7/3 16:15:00
出自:石家庄铁道大学大学英语Ⅲ
The decision _____, what is to be done now is how to&#
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
Once he starts a job, he won’t stop_______it is finished.
A、 till
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
He was always attentive ____ my ideas.
A、 to
B、 with
C、 on
D、 at
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
We consider_______the instrument be adjusted each time it is used.
更新时间:2023/7/3 16:14:00
出自:石家庄铁道大学大学英语Ⅲ
He would not do _____ the doctor advised.
A、 as
B、 so
C、 so as
D、 as
更新时间:2023/7/3 16:13:00
出自:石家庄铁道大学大学英语Ⅲ
目前为：
8/20
页
首页 上页 下页 尾页