单选题
操作调光开关,确保光的强度发生变化。
A
Turn the dimming knob and find out the intensity of the light changes.
B
Press the light exchange switch to observe the change of light intensity.
C
Operate the dimmer switch and make sure that the intensity of the light changes.
答案解析
正确答案:C
相关知识点:
操作开关确保光强变
