单选题:在电力工程直流电源系统设计时,对于交流电源事故停电时间的确定,下列哪一项是不正确的?( ) 题目分类:供配电专业知识 题目类型:单选题 查看权限:VIP 题目内容: 在电力工程直流电源系统设计时,对于交流电源事故停电时间的确定,下列哪一项是不正确的?( ) A.与电力系统连接的发电厂,厂用交流电源事故停电时间为1h B.不与电力系统连接的孤立发电厂,厂用交流电源事故停电时间为2h C.直流输电换流站,全站交流电源事故停电时间为2h D.无人值班的变电所,全所交流电源事故停电时间为1h 参考答案: 答案解析:
The hotel is almost finished, but it __________needs one or The hotel is almost finished, but it __________needs one or two weeks to get re 分类:供配电专业知识 题型:单选题 查看答案
Tom took a taxi to the airport, only __________ his plane hi Tom took a taxi to the airport, only __________ his plane high up in the sky.A. 分类:供配电专业知识 题型:单选题 查看答案
This is not my story, nor__________the whole story.My story This is not my story, nor__________the whole story.My story plays out differentl 分类:供配电专业知识 题型:单选题 查看答案
“五更钟漏欲相催,四气推迁往复回。帐里残灯才去焰,炉中香气尽成灰。渐看春逼芙蓉枕,顿觉寒销竹叶杯。守岁家家应未卧,相思那 “五更钟漏欲相催,四气推迁往复回。帐里残灯才去焰,炉中香气尽成灰。渐看春逼芙蓉枕,顿觉寒销竹叶杯。守岁家家应未卧,相思那得梦魂来。”这首诗描写的节日是:A.中秋 分类:供配电专业知识 题型:单选题 查看答案
--Goodbye, John.Come back again sometime.--Sure.__________ . --Goodbye, John.Come back again sometime.--Sure.__________ .A.I did B.I do C.I 分类:供配电专业知识 题型:单选题 查看答案