在原子吸收分光光度法中，（）不是背景干扰的主要因素。
A.光源
B.分子吸收
C.光散射
D.火焰气体
参考答案：A
The old temple ________ roof was damaged in a storm is now under repair. [ ]
A. where
B. which
C. its
D. whose
