欲了解窗外遮光物是否影响室内采光()
A.采光系数
B.入射角
C.开角
D.自然照度系数
E.人工照度
参考答案:C
Look! Jack and his monkey _________ flying disk together in the garden.
A.is playing
B.was playing
C.are playing
D.were playing
导游人员在为游客服务的过程中,应该为其提供个性化的服务,对于旅游者的各种要求导游人员应该尽力设法满足。( )117