不中断，无瞬变交流电源的输出设备有（）。
A.蓄电池
B.UPS
C.开关电源
D.交流配电屏
参考答案：B
–Jack is good at maths and doesn’t perform well in English.
–_____.
A．It was the same with Mike
B．So it is with Mike
C．So is Mike
D．So does Mike
