问题
单项选择题
I类设备中500kV导线弧垂误差必须在+2.5％～-2.5％范围之内，三相导线不平衡度不超过（）。
A、80mm；
B、200mm；
C、250mm；
D、300mm。
答案
参考答案：D
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I类设备中500kV导线弧垂误差必须在+2.5％～-2.5％范围之内，三相导线不平衡度不超过（）。
A、80mm；
B、200mm；
C、250mm；
D、300mm。
参考答案：D
| 根据首字母和句意填空。 |
| 1. My cousin is an a_________. 2. He had to work in a building-field to make a l________. 3. I don't want to wear my j________. 4. This is the most important e________ of the year. 5. I hope our football team will be l________ in Asia Cup. 6. We can find the kind-hearted person e_________. 7. The managers of the centre are on their v_________ to America. 8. I r________ that getting up early is good for our health. 9. Did you c_________ the best one? We have no time. 10. Children must wash their clothes t_________. |