首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置:
模拟考场
>
湖北自学考试
>
专业课
>
机械工程控制基础
>
浏览试题
[判断题]
单位阶跃函数的拉氏变换是1。
A
错误
B
正确
收藏
查看答案
参考答案
试题答案:
错误
答案解释:
单位阶跃函数的拉氏变换是1。
相关题目
传递函数中各项系数值和相应微分方程中各项系数对应相等,完全取决于系统的结构参数。
二阶系统的振荡幅值主要取决于A.系统阻尼B..上升时间C.峰值时间D.调整时间
控制系统中延时环节对稳定性的影响是___
正反馈是指反馈回去的信号与原系统的输入信号相位相差
对于典型二阶系统,当()时,最大超调量σ为0。
系统的频率特性这一数学模型取决于()
主导极点的特点是()
控制系统中一阶系统是指A.具有时间常数B.具有系统增益C.能用方块图描述D.能用一阶微分方程描述.
某开环系统增加如下的某一环节后,致使系统的稳定性变差的是()
系统的频率特性是系统脉冲响应函数g(t)的________变换。
热门试题
1.
ge Two Are you aware that you actually possess six senses? The sixth is a muscular sense responsible for directing your muscles intelligently to the exact extent necessary for each action you perform. For example, when you reach for an object, the sensory nerves linking the muscles to the brain stop your hand at the correct spot. This automatic perception of the position of your muscles in relation to the object is your muscular sense in action. Muscles are stringly bundles of fibers varying from one five-thousandth of an inch to about three inches. They have three unique characteristics, they can become shorter and thicker; they can stretch; and they can retract to their original positions. Under a high-powered microscope, muscle tissue is seen as long, slender cells with a grainy texture like wood. More than half of a person‘s body is composed of muscle fibers, most of which are involuntary—in other words, work without conscious direction. The voluntary muscles, those that we move consciously to perform particular actions, number more than five hundred. Women have only 60 to 70 percent as much muscle as men for their body mass. That is why an average woman can’t lift as much, throw as far, or hit as hard as an average man.
2.
35. The Jazz Age of the 1920s characterized by frivolity carelessness is brought vividly to life in_______.
3.
2. In the United States, the traditional school year is September to June. Summer school used to be seen mainly as a place for high school students to repeat classes they failed. But summer programs have expanded. Students often go to summer school so they can ease their class load during the school year. Or, it might give them more freedom to choose the classes they want during the regular term.Summer school students do the same amount of work as if they took the class during the school year. But they do it in a much shorter time—just one to two months. They generally attend school for three to four hours every morning, five days a week. Another choice for many students is to take classes online. Students work by computer at home or wherever they have an Internet connection. They could even be traveling with their families. However, some online classes require students to come to a classroom to take tests. Students may also have to take part in group discussions with the teacher online. And there may be a required number of hours to spend logged on each day. Yet there may also be freedom to do the work anytime, day or night.(5分)2.1 A student in the United States doesn’t need to attend school in ______.(1分)A. MarchB. AugustC. DecemberD. February
4.
- How are you going on with your English? - _________
5.
36.王荆公体
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3415做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有2213做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1895做题
湖北成考专升本政治真题(2021年)
去做题
已有1345做题
成人高考高起点语文考试高分突破试题及答案四
去做题
已有1190做题