对非主要园林附属建筑和边缘区域的园路,优先考虑的是采用()
A. 氮灯、卤钨灯和日光色荧光灯
B. 普通荧光灯或白炽灯
C. 缸灯或金属卤化物灯
D. 卤钨灯和白炽灯
勒克斯(Lx)是( )的单位
A. 色温
B. 光通量
C. 照度
D. 光效
为了提高限定区域或目标的照度,使其比周围亮的光照形式是( )
A. 剪影照明
B. 背光照明
C. 泛光照明
D. 重点照明
Supply the missing information according to the story.It is a __________1__________ day. Bill Porter stopped at the first house. He ___2___ the bell. A woman comes to the door and refuses him by an ___3___. The person in the second house even doesn’t give him a chance to speak. For ninety minutes, Porter hasn’t made a __4__, but he doesn’t _____5_____. At last a woman is ____6_____ to buy a cake of soap from him.