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【单选题】
压频比控制的变频调速在额定频率以下频率范围内（ ）恒定，具有（ ）的调速性质。A.
磁通，恒功率
B.
电压，恒转矩
C.
电压，恒功率
D.
磁通，恒转矩
E.
电流，恒转矩
F.
电流，恒功率
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【单选题】--- Do you know _____________? --- Sorry, I have no idea. I’ll search the Internet to find it out.
A.
where will the next Expo be held
B.
when will the next Expo start
C.
what will the next Expo be held for
D.
how many countries will take part in the next Expo
【简答题】阅读理解。 Expo 2010 is held in Shanghai from May 1 to October 31. People all over the world are looking forward to it. Here are several golden rules on how to best plan your trip. Rule 1: Do your homework...
【单选题】某市文化部门重点支持县级文化馆、乡镇文化馆、社区文化馆、农村文化大院建设，这些举措的重要意义在于（） ①大力发展文化产业，创新文化产业发展模式 ②构建社会主义核心价值体系，引领社会新思潮 ③促进公益性文化事业，保障公民基本文化权益 ④提供良好的公共文化服务，实现基本公共服务均等化
A.
①②
B.
③④
C.
①④
D.
②③
【简答题】Expo 2010 is held in Shanghai from May 1 to October 31．People all over the world are looking forward to it．Here are several golden rules on how to best plan your hip． Rule 1：Do your homework Read ever...
【简答题】阅读理解。 Expo 2010 is held in Shanghai from May 1to October 31.People all over the world are looking forward to it. Here are several golden rules on how to best plan your trip. Rule 1: Do your homework R...
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