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【单选题】
直流调速系统的性能指标包括稳态指标和动态指标，（ ）既不是稳态指标也不是动态指标。A.
调速范围
B.
静差率
C.
输出电流变化率
D.
超调量
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反馈参考答案：
举一反三
【多选题】中外文电子图书数据库有哪些?( )
A.
超星数字图书馆、正中文电子书
B.
书生之家数字图书馆、世纪顶新外文数字图书馆
C.
OCLC Net Library 电子图书，SpringerLink
D.
John Wiley，Ebrary外文电子图数据库
【简答题】Conversation 2 Question 18A. He is a
regular customer. B. He is one
of her friends. C. He is the
manager of the store. D. He is a
new customer of the store.
【单选题】Section C Conversation 2 18.
A.
For two years.
B.
For three years.
C.
For five years.
D.
For six years.
【单选题】Conversation 2 18)
A.
He has to meet a client.
B.
He has to finish a report.
C.
He has to prepare for a meeting.
D.
He has to fix his computer.
【简答题】Conversation 2A. 18. A . on Friday B. 18. B. on Thursday C. 18. C. on Wednesday D. 18.D. on Monday
【单选题】Conversation 2 18.
A.
An auto company.
B.
An IT company.
C.
A shipping company.
D.
A food company.
【单选题】18(Conversation 2)
A.
Next Tuesday.
B.
Next Wednesday.
C.
Next Thursday.
D.
Next Friday.
【单选题】Conversation 2-18
A.
For six years.
B.
For five years.
C.
For three years.
D.
For two years.
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