【单选题】
变电站不同外接站用电源( )取至同一个上级变电站.___
A. 不能
B. 可以
C. 同时
D. 不同时
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答案
A
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相关试题
【单选题】
330kV及以上变电站主变压器为两台 (组)及以上时，由主变压器低压侧引接的站用变台数不少于( )，并应装设一台从站外可靠电源引接的专用备用站用变.___
A. 一台
B. 二台
C. 三台
D. 四台
【单选题】
330kV 及以上电压等级变电站及重要的220kV变电站应采用（）充电装置，两组蓄电池组的供电方式。每组蓄电池和充电装置应分别接于一段直流母线上，第三台充电装置（备用充电装置）可在两段母线之间切换，任一工作充电装置退出运行时，手动投入第三台充电装置___
A. 1台
B. 2台
C. 3台
D. 3台以上
【单选题】
断路器操动机构试验时操动机构分、合闸电磁铁或合闸接触器端子上的最低动作电压应在操作电压额定值的（）间。 ___
A. 10%～45%
B. 20%～55%
C. 30%～60%
D. 30%～65%
【单选题】
测试前，应通知有关人员离开被试设备，并取得（）许可，方可开机测试,测试过程中应有人监护并呼唱，断路器处禁止其他工作；___
A. 运行人员
B. 测试负责人
C. 检修负责人
D. 班组长
【单选题】
测量变压器绕组直流电阻时除抄录其铭牌参数编号外，还应记录( ) ___
A. 环境空气湿度
B. 变压器上层油温(或绕组温度)
C. 变压器散热条件
D. 变压器油质试验结果
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21.—Why not take ____ umbrella with the sign “Made in China”? It is useful.
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B. B
C. C
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【单选题】
22. —Do you know the boy________ is sitting next to Peter?
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C. why can I use it D. how can I use it
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B. B
C. C
D. D
【单选题】
25. _______ are you going to the School Uniform Exhibition, Amy ?
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( ) 26. Where does the writer of "The little Prince" come from?
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A. A
B. B
C. C
D. D
【单选题】
( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
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D．He discovers interesting things such as a snake, other roses and a fox
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B. B
C. C
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【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
A．the adult world B．the planet B -612
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A. A
B. B
C. C
D. D
【单选题】
( ) 29. What is the writer's main purpose（目的）in writing this passage？
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B．To tell people what kind of person his father was．
C．To tell the readers what present he got from his father．
D． To let people know how poor he was．
A. A
B. B
C. C
D. D
【单选题】
( ) 30. Why did the father not ask his son not to do this and do that？
A．Because he felt quite confident of his son．
B．Because he was born from a poor family．
C．Because he was a man of few words．
D．Because he didn't want to be much too strict with his son．
A. A
B. B
C. C
D. D
【单选题】
( ) 31. What would someone learn from this passage？
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A. A
B. B
C. C
D. D
【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage？
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A. A
B. B
C. C
D. D
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her?
A. She had seven tickets.
B. She hoped to please others.
C. She knew the car drivers well.
D. She wanted to show kindness.
A. A
B. B
C. C
D. D
【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ .
A. thought it was beautifully written
B. wanted to know what it really meant
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D. wanted her husband to put it up in the classroom
A. A
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C. C
D. D
【单选题】
( ) 35. Who came up with the phrase according to the passage?
A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
A. A
B. B
C. C
D. S
【单选题】
( ) 36. What can we infer from the last paragraph?
A. People should practice random kindness to those in need.
B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
A. A
B. B
C. C
D. D
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
A. A
B. B
C. C
D. D
【单选题】
( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
C. irrigation and making electricity D. washing clothes
A. A
B. B
C. C
D. D
【单选题】
( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
C. chemicals and other materials D. people's building a dam across a river
A. A
B. B
C. C
D. D
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
C. Transportation D. Natural Resources
A. A
B. B
C. C
D. D
