皮皮学，免费搜题
登录
搜题
【单选题】
根据系统的机理分析,列写系统微分方程的一般步骤为() (1)消去中间变量,得到输入、输出变量的微分方程;(2)标准化:将与输入有关的各项放在等号右边,与输出有关的各项放在等号左边,并且分别按降幂排列,最后将系数归化为反映系统动态特性的参数,如时间常数等。(3) 根据控制任务要求,确定系统的输入、输出变量;(4) 从输入端开始,按照信号的传递顺序,依据各变量所遵循的物理、化学等定律,列写各变量之间的动态方程;A.
（3）——>（4）——>（1）——>（2）
B.
（1）——>（2）——>（3）——>（4）
C.
（3）——>（4）——>（2）——>（1）
D.
（3）——>（2）——>（1）——>（4）
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】From the paragraph 5 we may infer that Anorexia and Bulimia are ______.
A.
two similar mental illnesses
B.
two different common mental illnesses
C.
both bad eating habites
D.
both illnesses of eating disorders
【单选题】From the Paragraph 5 we may infer that Anorexia and Bulimia are______.
A.
two similar mental illnesses
B.
two different common mental illnesses
C.
both bad eating habits
D.
both illnesses of eating disorderly
【简答题】接合菌门的有性孢子称为 _________ 。
【简答题】. The global financial cr is likely to cause increased mental health problems and even suicides（自杀）as people struggle to deal with poverty and unemployment, the World Health Organization warned Th...
【简答题】The global financial cr is likely to cause increased mental health problems as people struggle to deal with poverty and unemployment, the World Health Organization warned Thursday． Hundreds of mil...
【简答题】接合菌的有性孢子称为 ( )。
【单选题】From the fifth paragraph we may infer that Anorexia and Bulimia are
A.
two similar mental illnesses.
B.
two different common mental illnesses.
C.
both bad eating habits.
D.
both illnesses of eating disorders.
【简答题】Complete the essay based on the given outline. 1.心理健康问题往往是导致疾病的原因 2.分析人们产生心理健康问题的原因(可从失业、压力过重、缺少支持、缺乏人际交往能力等方面加以分析) 3.你认为人们应如何保持心理健康 How to Keep Psychologically Healthy? One in four people will experi...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
