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 使用MATLAB 求解方法求系统的幅值裕度和相位裕度的函数为（）。

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margin

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SECTION B  INTERVIEW
In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your answer sheet.
Questions 1 to 5 are based on a conversation. At the end of the conversation you will be given 10 seconds to answer each of the following five questions. Now, listen to the interview.
 ​浏览器不支持音频​
1. According to the interview, people often spend time looking for things because [填空1].[空格内填写选项大写字母]
A. they suffer from amnesia
B. they are not organized
C. they have too many things
D. they are often in a hurry
 
2. As for banking online, which of the following is NOT suggested?[填空2] [空格内填写选项大写字母]
A. Giving up a little control.
B. Using the website of your bank.
C. Asking questions about its safety.
D. Contacting consumer service clerks.
 
3. Which of the following is the advice given to library people? [填空3][空格内填写选项大写字母]
A. Go online and wait for the delivery of the book ordered.
B. Check the library’s website and then go to the library.
C. Go online or go to the library to check whether a book is in store.
D. Put a book in order and call a librarian to ask when you can get it.
 
4. The thing that should be put at hand in every single room is [填空4].[空格内填写选项大写字母]
A. a brush
B. a thread
C. a present
D. scissors
 
5. Carolyn Forte gives us time-saving tips on all of the following EXCEPT [填空5].[空格内填写选项大写字母]
A. doing shopping
B. traveling by air
C. making phone calls
D. putting things in order
未知题型
在本案例中，该求助者出现了（ ）。 查看材料
单项选择题
Internet的通信协议是（ ）。 A.
A、SMTP B.
B、CSMA/CD C.
C、POP3 D.
D、TCP/IP
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