指数平滑法适合于预测（）
A.平稳序列
B.非平稳序列
C.有趋势成分的序列
D.有季节成分的序列
参考答案：A
During the war three nations fought _____ the island as an airport. [ ]
A. for controlling and using
B. to control and using
C. controlling and using
D. to control and use
什么叫电流的热效应、磁效应、化学效应？
