变压器并联运行中,各变压器的连接组号必须()。
参考答案:绝对保证相同
在比例尺为1:5000的地图上,量得甲、乙两地的距离为25cm,则甲、乙两地间的实际距离是( )
A.1250km
B.125km
C.12.5km
D.1.25km
The earthquake which happened in Yushu________ 14th April 2010 was a big disaster.
A.at
B.on
C.in
D.to