控制系统的数学模型有动态模型和静态模型之分。_爱下问搜题

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问题判断题

控制系统的数学模型有动态模型和静态模型之分。

答案

参考答案：对

补全对话，情景问答

a. What time do you usually get up on weekdays
b. I usually have some cakes and a glass of milk
c. Class begins at eight o'clock
d. I get home at five-thirty
e. When do you play games
f. I have lunch at school
g. When do you get home

A: Hi, Lucy!    1   ?
B: Well, I live near my school, so I get up at a quarter to seven. I never go to school late.
A: Do you have breakfast at home?
B: Yes,    2   .
A: When do you go to school?
B:    3   , so I go to school at seven forty-five.
A:    4   ?
B: I leave school at five past five and    5   .

单项选择题

校验动稳定时，电动力一般用( )。

A．两相短路；
B．三相短路；
C．单相接地短路；
D．两相接地。