问题
填空题
直流电力回路专用的中性线和直流两线制正极的接地体、接地线不得与自然接地体有（）连接，当无绝缘隔离装置时，相互间的距离不应小于（）。
答案
参考答案：金属；1m
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直流电力回路专用的中性线和直流两线制正极的接地体、接地线不得与自然接地体有（）连接，当无绝缘隔离装置时，相互间的距离不应小于（）。
参考答案：金属；1m
| 用方框中所给词语的适当形式填空，使短文正确、通顺、连贯。(每词限用一次) | |
First we took the underground to the centre of Beijing, and then 1. to the bus to the Temple of Heaven. We visited the places of 2. there and had a wonderful 3. . Then we 4. a bus to Beijing Amusement Park. We 5. hide-and-seek there. We were tired 6. we enjoyed ourselves. We went back home 7. bus and underground. Tomorrow we 8. to the World Park in Beijing. I'm very excited 9. I will see lots of great places 10. all of the world. |