【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】—— ______ d id you go to Beijing? —— I took the train. I like traveling by train. A. Why B. When C. How D. Who
【单选题】How do I like to travel? Many people like to travel by plane, but I don’t like it because an airport is usually far from the city. You have to get there early and wait for hours for the plane to take ...
A.
he thinks it takes a lot of time to go to and get out of the airport.
B.
He likes to take a train because it takes a little more time.
C.
He likes to take a car because he has a car.
【单选题】在去北京的旅途中,为了保证财物安全,特意带了密码锁,密码锁有3个拨号盘。每个拨号盘上有从0到9共10个数字,这3个拨号盘可以组成不同的三位数字密码的个数是多少? ( )
【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】青花瓷是在( )上缀以青色文饰、清丽恬静,既共雅义丰富
【单选题】凯恩斯认为,影响货币总需求的因素是( )
【简答题】How do I like to travel? Many people like to travel by plane, but I don't like it because an airport is usually far from the city. You have to get there early and wait for hours for the plane to take ...