题目

Professor James will give us a lecture on Western culture, but when and where (not decide)yet. 答案：【1】hasn't been decided我国冬季南北温度差异大的主要原因之一是（　　）A．南北纬度跨度大B．东西经度跨度大C．东部沿海受到海洋影响大D．太阳高度小，日照时间短