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【单选题】
如图所示的控制电路可以实现 ( )控制。A.
三相异步电动机的正反控制
B.
三相异步电动机的点动控制
C.
三相异步电动机的长动控制
D.
三相异步电动机的点-长动控制
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皮皮学刷刷变学霸
举一反三
【单选题】What happened when Mrs. Grey came back from work that evening?
A.
A policeman was waiting for her.
B.
She had another accident.
C.
She couldn't find a place to park her car.
D.
The young man was waiting for her in his car.
【单选题】What happened to Georgiana when she as taken from school to Ramsgate a year ago?
A.
She was taken very good care of by Mrs Younge.
B.
She fell in love with Mr Wickham there.
C.
She was persuaded to elope with Mr Wickham.
D.
She went on a journey with Mr Wickham.
【简答题】基于文件系统的概念,可以把数据组成分为 数据项 、 和 三级。
【单选题】What happened to Mrs. White after she was taken back to the store?
A.
She was questioned by the police.
B.
She was shut in a small room for 20 minutes.
C.
She was insulted by the shoppers around her.
D.
She was body-searched by the store manager.
【单选题】What happened to Mrs. Rosen on the boat journey to Sweden?
A.
She got seasick.
B.
She cried all the way across the ocean.
C.
She helped Uncle Henrik with the fishing nets.
【单选题】What happened to Mrs. Greys car one morning?
A.
It was pulled away by the traffic polices.
B.
It was driven away by a young man.
C.
It ran into another car and was damaged.
D.
It was not parked at the railway station.
【简答题】补全对话。 A: Do you know what happened to Wang Fang? B: 1______ . I learned about it in the school newspaper. A: 2______? B: First , she heard her neighbour Mrs Fang calling for help. Then she called 11...
【简答题】分度为1mm/50的游标卡尺如何度数?
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