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【单选题】
三相异步电动机的同步转速由 决定。A.
电源电压
B.
电源频率
C.
电源频率和磁极对数
D.
磁极对数
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反馈参考答案：
举一反三
【单选题】Every evening after dinner, if not （ ）from work, I will spend some time walking my dog.
A.
being tired
B.
tiring
C.
tired
D.
to be tired
【单选题】An insect living on and eating rice is significant because ?
A.
it is new.
B.
it is unusual.
C.
it is significant.
D.
it is about people.
【简答题】阅读理解。 That cold January night, I was growing sick of my life in San Francisco. There I was walking home at one in the morning after a tiring practice at the theater. With opening night only a week awa...
【简答题】阅读理解。 That cold January night, I was growing sick of my life in San Francisco. There I was, walking home at one in the morning after a tiring practice at the theatre. With opening night only a week aw...
【简答题】There is one word that is on the lips of Americans , day and night , “Sorry”. One time as I was walking on the street , a young man ran by hurriedly , brushing against my handbag . Even as he continue...
【单选题】我国民法的基本原则是()。
A.
平等、自愿、公平、诚实信用、公序良俗、节约资源和保护生态环境等原则
B.
遵循职权法定、程序法定、公正公开、有效监督等原则
C.
遵循公平和谐与国家适度干预原则
D.
维护社会秩序和公共安全原则
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