在物理实验中，对物理量进行多次测量，有的是为了通过多次测量提高精度，有的是为了通过多次测量寻找规律。下面四个实验中，哪个是通过多次测量提高精度（   ）

根据句意及首字母提示完成单词。
(1)Did Li Lei a____  with you in the class meeting?
(2)There’s n____  in her schoolbag.  She looks very worried.
(3)Different (不同的) countries have different c____ 
(4)I don’t like the i____  that students can’t wear their own clothes.
(5)Most of girls like c____  clothes.

人们根据____ 获得太阳热量的多少，并将其划分为　____ 　等五带（任写一个）．