3R
参考答案：
抗性（resistance)、再猖獗（resurgence)和残毒（residue)
Tom is talking about the accident as though he _______ it. [ ]
A. saw
B. had seen
C. has seen
D. would see
链式动力配电主接线相连的设备总量不宜超过（）kW。
A.3
B.5
C.10
D.15
