173°W属于( )
A．西一区
B．西九区
C．西十区
D．西十二区
答案：D
本题考查时区和区时。173°W除以15，四舍五入得位于西十二区。
The boss left the office angrily because of ______ his men said then.
A．what
B．that
C．why
D．which
10kV配电线路，已知总负荷Ps为880kW，计算推荐需用系数Kx取0.4，cosα=0.7。试确定变压器容量。
