下面的缩写全称?SPF UNESCO UNICEF 相关知识点: 试题来源: 解析 SPF 防晒系数(SUN proteetion Factor)UNESCO 联合国教育科学及文化组织 (united nations educational,scientific and cultural organization)UNICEF 联合国儿童基金会(Nations International Children's Emergence Fund )...
UFO是指不明飞行物．