操作调光器电门，确保光强发生变化
A.Operate the dimmer switch and make sure that the intensity of the light changes. B.Control the light knob to ensure that the light strength changes. C.Turn the light regulator on to adjust the luminous intensity.正确答案A
操作调光器电门，确保光强发生变化
A.Operate the dimmer switch and make sure that the intensity of the light changes. B.Control the light knob to ensure that the light strength changes. C.Turn the light regulator on to adjust the luminous intensity.正确答案A
