除去栓剂中的基质（油脂性）可用（）
A.水洗法
B.萃取法
C.冰浴凝结法
D.大孔树脂柱色谱法
E.聚酰胺柱色谱法
参考答案：C
空间结构分析主要按市场、职能、行业、专业、企业、业务、品种等方面进行分析研究，目的是为了发现市场、开拓市场、改进工作、寻找机遇。
What is this talk mainly about
A．How historical events affected an art movement.
B．How artists can influence economic conditions.
C．Why a certain art movement failed to become popular.
D．How valuable paintings were lost during wartime.
