问题 问答题 简答题

更换电能表或电能表接线时应注意哪些事项?

答案

参考答案:

应注意以下事项

(1)先将原接线做好标记。

(2)拆线时,先拆电源侧,后拆负荷侧;恢复时,先接负荷侧,后接电源侧。

(3)要先做好安全措施,以免造成电压互感器二次短路或接地、电流互感器二次回路开路。

(4)工作完成应清理、打扫现场,不要将工具或线头遗留在现场,并应再复查一遍所有接线,确保无误后再送电。

(5)送电后,观察电能表运行是否正常。

(6)正确加封印。

阅读理解

阅读理解。

     Last year I travelled to Paris by plane. I was very excited because I knew I would meet a lot of

interesting people and see some amazing things there. On the night before I left, I was so excited that

I couldn't sleep at all. When I sat on the plane the next day, I felt very tired. I wanted to have a good

sleep during the 9-hour flight. Unluckily, there was a baby sitting next to me. It cried and screamed

during the whole trip. How could I fall asleep with all of that noise?

     When I arrived in Paris at last, it was already 8 o'clock in the evening. I felt even more tired. After

getting off the plane, I went to my hotel at once. I paid no attention to the beautiful evening scenery of

Paris. I just wanted to have a good rest in my room. When I lay down on the comfortable bed, I fell

asleep very quickly.

     A sudden noise woke me up at midnight. I didn't know what happened, so I turned on the light. What

did I see? You wouldn't believe it! I saw two mice playing on the floor!

     What a terrible trip!

1. How did the writer travel to Paris?[ ]

A. By train.

B. By plane.

C. By boat.

D. By car.

2. When did the writer probably start his trip?[ ]

A. At about 9 a.m.

B. At about 10 a.m.

C. At about 11 a.m.

D. At about 12 a.m.

3. Why did the writer feel even more tired when he arrived in Paris?[ ]

A. Because he didn't sleep well the night before.

B. Because he didn't want to go to Paris.

C. Because a baby sang songs all the way during the whole trip.

D. Because the flight was too long and a baby cried and screamed during the whole trip.

4. What did the writer see in the hotel room at midnight? [ ]

A. A mouse.

B. A cat.

C. Two cats.

D. Two mice.

5. What can we learn from the passage? [ ]

A. The writer had a good rest in the hotel room.

B. The writer couldn't sleep well in the hotel room, either.

C. The writer enjoyed the first night in Paris a lot.

D. The writer would never travel by plane again

填空题