问题
问答题 简答题
220KV线路停、送电操作顺序，为什么？
答案
参考答案：
停电时依次断开开关、拉开线路侧隔离刀闸、拉开母线侧隔离刀闸；送电时依次合上母线侧隔离刀闸、合上线路侧隔离刀闸、合上开关；是为了保障在操作时开关万一没有断开出现的事故情况下通过线路开关的保护可靠动作将停电范围缩小、以免扩大。
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220KV线路停、送电操作顺序，为什么？
参考答案：
停电时依次断开开关、拉开线路侧隔离刀闸、拉开母线侧隔离刀闸；送电时依次合上母线侧隔离刀闸、合上线路侧隔离刀闸、合上开关；是为了保障在操作时开关万一没有断开出现的事故情况下通过线路开关的保护可靠动作将停电范围缩小、以免扩大。
Who designed the first helicopter(直升机)? Who __1___some of most famous pictures in the world? Who knew more about the human body than most ___2___of his time? There is an answer ___3___ all these questions --Leonardo da Vinci (达•芬奇) Leonard may have been the greatest genius ___4___ have ever known. He lived in Italy around the year 1500, but many of his inventions seem modern to us today. For example, one of his notebooks has drawings of a helicopter. Of course, he couldn’t ____5___ a helicopter with the things he had. But scientists say his idea would have worked. But Leonard ___6___ an inventor. He was one of the greatest artists of his day. By the time he was twenty years old, he was called a master(大师) painter, and as he got older he became ___7__ more famous. Sometimes he drew a hand in ten different ways ____8___he was ready to paint. Many of Leonardo’s wonderful paintings are still with ____9___today. You may know one of his most famous works-- the ___10___ woman known as the Mona Lisa.
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