问题
判断题
如果一个数列的自相关系数出现周期性变化,每间隔若干个便有一个高峰,表明该时间数列是趋势性时间数列。 ( )
答案
参考答案:错
如果一个数列的自相关系数出现周期性变化,每间隔若干个便有一个高峰,表明该时间数列是趋势性时间数列。 ( )
参考答案:错
根据对话内容,从方框中选择适当的选项补全对话, 选项中有两项是多余的。
Father: Let’s look at the map. Mother: Shall we watch TV at home? Jim: No. 小题2: . Father: Let me see. We shall go to that park. It’s near the sea. Jim: 小题3: . Father: We shall have a swim in the sea. Then we shall have a meal at the seaside. Jim: Great! Father: Come on! Let’s all get into the car. Jim: 小题4: Dad? Father: There’s something wrong with the car. Mother: 小题5: . |