如何在我校图书馆找到Spischolar A. 图书馆主页-馆藏资源-数据库导航-中文资源-Spischolar学术期刊指南 B. 图书馆主页-馆藏资源-试 用数据库-Spischolar学术期刊指南 C. 图书馆主页-读者互动-Spischolar学术期刊指南 D. 图书馆主页- 读者服务-Spischolar学术期刊指南
【单选题】According to the key words, try to find out which of the following sentences show causes and which show effects. 中心词: music in the United States Popular music showed a definite change in the 1950s--- ...