单项选择题博物馆照明中,下列哪种投射方式最适合于勾勒展品的边缘线条?( ) A、顶光 B、底光 C、侧光 D、背光
单项选择题According to researchers, which chemical is most closely children. Do you think this related to successful long-term relationships? (Text A) A、dopamine B、oxytocin C、serotonin for in a mate these days? D、none of the above
