【单选题】我国用电规程中规定,在电压低于1000V的中性点接地的三相四线制供电系统中,例如380V/220V系统不允许采用(),只能采用()。
【单选题】我国在380v/220v低压供电系统中,一般采用什么样的中性点运行方式?
【单选题】Would you risk your life for a country that considered you a second-class citizen?Would you join a military that asked you to risk sacrificing your life but separated you from other soldiers because o...
A.
American Soldiers in World War II.
B.
American Civil Rights Movement.
D.
Racial Discrimination in the U. S.
【简答题】写一函数days,实现第一题的的计算,由主函数将年,月,日传递给days函数,计算后将日子传回主函数输出。 2、 编写一个函数print,打印一个学生的成绩数组,该数组中有5个学生的数据记录,每个记录包括num,name, score[3],用 主函数输入这些记录, 用print函数输出这些记录。 3、 有10个学生,每个学生的数据包括学号、姓名、3门课的成绩,从键盘输入10个学生数据,要求打印出...
【单选题】If he hadn't stood under the ladder to catch you when you fell, you ______ here now.
【单选题】听力原文:M: Lucy, if you are going to Naomi' s party tomorrow night, could you pick me up? My car's at the garage until this weekend. W: No problem, Jerry. What time should I pick you up? M: Let' s see. I...
【单选题】----Woul d you mind the windwow? ---- It’s cold outside.
A.
me open ,Of course not
B.
mine opening , Certainly not
C.
my opening , You’d better not
D.
mine open , Not at all
【多选题】下面关于中性点接地方式使用一般原则叙述正确的是()。
A.
中性点直接接地方式使用在电压等级在110kV及以上电压的系统和380V/220V的低压配电系统中
B.
中性点不接地方式使用在单相接地电容电流分别不超过30A的10kV系统和不超过10A的35kV系统
C.
中性点经消弧线圈接地方式使用在单相接地电容电流分别超过30A的10kV系统和超过10A的35kV系统
D.
中性点经消弧线圈接地方式用于雷电活动强、供电可靠性要求高的110kV系统
【简答题】Passerby: ____________. Naomi: You’re welcome.
【简答题】Thank you for your interest in volunteering with the City of Melbourne's tourism program. If you would like to receive an email advising you of the next recruitment(招募) intake, please email tourism@me...