根据句意及首字母提示填空,完成下列句子。

1. B_____Lily and Lucy are outgoing. They have lots of friends.

2. Edison showed great i______ in science when he was a little boy.

3. Nina went to school t ______she didn't feel very well today.

4. I'm d______from Rick. He is a little calmer than I.

5. It's not polite (礼貌的) to l______ at others when they make mistakes (错误).

对时间序列观察值，由远向近按一定跨越期计算平均值的预测方法，我们称为（）