照明施工图一般由照明施工图一般由（）系统图、平面图及照明配电箱安装图等组成。
参考答案：照明电气
. Some animals are in danger, and the scientists are doing ___ they can ___ them.
A．that; to save
B．whatever; to save
C．what; save
D．the thing; save
（）和（）串联组合成负荷开关
