三七抗炎、镇痛的主要活性成分是（）
A.三七黄酮B
B.齐墩果酸
C.人参二醇皂苷
D.三七氨酸
E.三七黄酮A
参考答案：C
Mr. Black is very happy because the clothes made in his factory have never been _____. [ ]
A. popular
B. more popular
C. most popular
D. the most popular
五代南唐花鸟画的代表画家是（）。
