问题
填空题
经变压器向220kV母线充电时，变压器中性点（），同时还应注意（）。
答案
参考答案：必须接地；防止出现铁磁谐振或因母线三相对地电容不平衡而产生的过电压
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经变压器向220kV母线充电时，变压器中性点（），同时还应注意（）。
参考答案：必须接地；防止出现铁磁谐振或因母线三相对地电容不平衡而产生的过电压
| 用所给词的正确形式完成短文。 | |
It opens at 5:00 a.m. all the year around, but the closing time 1 , depending on the season. Regent's Park has a lake, several public gardens, some sports grounds and three 2 playgrounds. Queen Mary's Garden inside it is famous for 3 of beautiful roses. In the north of Regent's Park is the London Zoo. It's 4 than any other zoo in the world. People can play many sports in Regent's Park, including tennis and 5 . People can go boating on the main lake and enjoy a picnic in the park, too. There will be sports events of the London Olympic Games in Regent's Park in 2012. 1.________ 2._________ 3._________ 4._________ 5._________ |