根据句意及首字母提示，写出在本课出现的单词。

1. We each b______ (拿，带) a painting we made in art class.

2. Mine was a picture of the o______.

3. The picture always makes me r______(记住) my holiday.

4. Karen and Jack showed us some p_______.

5. She has long h_______. She combed it ten times.

什么是吸收光谱与发射光谱？两者有什么不同？