社会背景
参考答案：指关于时代政治背景、国际形势、社会条件等背景材料。
按《中国药典》的规定，红外光谱仪校正的项目有
A．波数的准确性和杂散光
B．波数的准确性和分辨率
C．检测灵敏度和杂散光
D．检测灵敏度和分辨率
E．杂散光和分辨率
These photographs will show you __________. [ ]
A. what does Baoshan New Area look like
B. what Baoshan New Area looks like
C. how does Baoshan New Area look like
D. how Baoshan New Area looks like
