（）是指两个扇区的天馈线接反。
A.天馈线驻波
B.馈线进水
C.馈线损耗
D.天馈鸳鸯线
参考答案：D
在供电设施上发生事故引起的法律责任，按（）确定。
During many sectors are foundering, the $21 billion videogame-software industry is booming, adding game developers at a rate of 2,500 a year in the United States alone.
A．When
B．Whereas
C．Would
D．While
