【简答题】试述大型水轮发电机--变压器组继电保护配置特点。
【单选题】Every Friday afternoon of this month is _____ as a time when students can learn how to design a website.
【单选题】The problem Howe was trying to solve was______.
A.
what kind of thread to use
B.
how to design a needle which would not break
C.
where to put the needle
D.
how to get the thread to run smoothly around the needle
【单选题】This crop does not do well in soils ____ the one for which it has been specially developed.
【单选题】水轮发电机-变压器组继电保护配置不包括()。
【简答题】大型发电机组和重要发电厂的启动变保护宜采用双重化配置。每套保护均应含有完整的主、后备保护,能反应被保护设备的各种(),并能作用于()或给出()。