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【单选题】
利用( )来降低加在定子三相绕组上的电压的启动叫自耦降压启动A.
白耦变压器
B.
频敏变压器
C.
电阻器
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举一反三
【单选题】What is the distance from the bottom of wave trough to the top of a wave crest?
A.
wave length
B.
wave height
C.
wave breadth
D.
wave depth
【单选题】Which of these words best describes Beethoven's music when his hearing began to fail?
A.
Stately.
B.
Elegant.
C.
Turbulent.
D.
Loud.
【简答题】Andrew Mason studied music at university, where he dreamt about his riches as a rock sta.
【单选题】《中华人民共和国合同法》规定,限制民事行为能力人订立的合同,只有经法定代理人追认后,该合同方才有效。但相对人可以催告法定代理人在( )内予以追认。
A.
15天
B.
1个月
C.
3个月
D.
6个月
【单选题】What is the distance from the bottom of a wave trough to the top of a wave crest?（）
A.
Wave length
B.
Wave height
C.
Wave breadth
D.
wave depth
【单选题】Which of these words best describes Beethoven's music when his hearing began to fail?
A.
Stately.
B.
Turbulent.
C.
Elegant.
D.
Loud.
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