原子吸收光谱法中应选用什么光源？为什么？
参考答案：
应选用能发射锐线的光源，如空心阴极灯；因为原子吸收线的半宽度约为10-3nm。
Do you know at this time yesterday? [ ]
A. what she is cooking
B. what is she cooking
C. what she was cooking
D. what was she cooking
