采用SF6气体作为绝缘介质的高压电气设备有（）。
A.变压器
B.断路器
C.套管
D.互感器
E.发电机
F.电缆
参考答案：A, B, C, D, F
____ impressed the audience most was_____the magician LiuQian played in last year’s Spring Festival Gala.
A．What; what
B．What; that
C．That; what
D．That; that
地槽
