交流双速电动机实现低速/高速变换时,其定子线圈的接线方式
时间:2017-11-11 12:19来源:未知 作者:admin 点击:
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1. 交流双速电动机实现低速/高速变换时,其定子线圈的接线方式保持不变。 A. 错误 B. 正确 满分:2 分 2. 风阀控制器应与风阀门轴垂直安装,垂直角度不小于85度。 A. 错误 B. 正确 满分:2 分 3. 控制器的主电源引入线应直接与消防电源连接、严禁使用电源插
一、单选题(共 20 道试题,共 80 分。)V 1. What is the train ________ to Birmingham?
A. fee
B. tip
C. fare
D. cost
满分:4 分
2. I didn’t buy the apples; she gave them to me ________ nothing.
A. with
B. as
C. for
D. by
满分:4 分
3. There have been many ______ in their marriage, but they still love each other.
A. right and wrong
B. back and forth
C. ups and downs
D. right and left
满分:4 分
4. I didn’t know what to do, but then an idea suddenly _______ to me.
A. appeared
B. happened
C. occurred
D. emerged
满分:4 分
5. New businesses _________ in this area due to the new policy adopted recently.
A. thrive
B. succeed
C. complete
D. achieve
满分:4 分
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