【单选题】【消耗次数：1】
绕线式异步电动机双馈调速，如原处于低同步电动运行，在转子侧加入与转子反电动势相位相同的反电）
①
10S，输出功率低于输入功率
②
B0S，输出功率高于输入功率
③
10S，输出功率高于输入功率
④
D0S，输出功率低于输入功率
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相关题目
【单选题】
绕线式异步电动机双馈调速，如原处于低同步电动运行，在转子侧加入与转子反电动势相位相同的反电）
①
nn，输出功率低于输入功率
②
B1nn，输出功率高于输入功率
③
nn，输出功率高于输入功率
④
D1nn，输出功率低于输入功率
【判断题】
异步电动机的工作特性，是指有电动机在额定电压和额定频率下运行时电动机的转速n、效率η、功率因数cos?、定子电流I1以及输出转矩T2与输出功率P2的关系？
①
正确
②
错误
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When I got my first sight of the garden, its beauty____________took my breath away.
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near
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nearly
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almost
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hardly
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at present
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at all
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right now
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at last
【多选题】
I want to mail this letter to the U.S..___________ ?
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How often do you hear from Mary
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How many people are there in your family
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How much is the postage
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How much will it cost
【多选题】
A: Hey, taxi! Could you take me to the Friendship Hotel?B: _______________ .
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Sure
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【多选题】
A: Is he married?B:_________
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No, he is not married.
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No, he is still single.
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No, he doesnt.
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No, he didnt.
【单选题】
Department stores in London are very large. They are called department stores because they have many_________ departments.
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delicious
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different
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domestic
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delighted
【单选题】
My father used to be very weak,_________ now he is much stronger.
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but
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at
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and
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when
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sometime
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sometimes
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some times
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If you are tired and_________, you can hardly (几乎不) remember things.
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relaxed
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【单选题】
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large