问题
填空题
某发电机的极对数p=4，电机频率f=50Hz，则该发电机转速n=（）r／min。
答案
参考答案：750
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某发电机的极对数p=4，电机频率f=50Hz，则该发电机转速n=（）r／min。
参考答案：750
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| Mr. and Mrs. Jones don't often go out 1 , but last Saturday, Mrs. Jones 2 to her husband, "There is a good 3 tonight. Can we go and watch it?" Mr. Jones was quite 4 about it, so they went and 5 of them liked the movie very much. They came out of the cinema at 11 o'clock pm, got into their 6 and began to drive home. It was quite dark, then Mrs. Jones said to Mr. Jones, "Look! A woman is running along the road very 7 , and a man is running after her. Can you see them?" Mr. Jones said, "Yes, I can." He drove the car slowly near the woman and said to her, "Can we 8 you?" "No, thank you," the woman said, but she didn't stop 9 . "My husband and I always run home after the movie, and the 10 one does the cleaning at home." | ||||
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