紫草的有效成分为()
A.黄酮类
B.蒽醌类
C.萘醌类
D.菲醌类
E.木脂素类
参考答案:C
解析:[知识点] 根及根茎类中药——紫草
I advise you leave the company as soon as possible you get yourself into trouble. [ ]
A. before
B. until
C. as soon as
D. in that case
应对金融危机的冲击,要求我们学会“危”中求“机”,转“危”为“机”,这体现了()
A.两点论与重点论的统一
B.矛盾双方在一定的条件下可以相互转化
C.发展是新事物的产生和旧事物的灭亡
D.矛盾双方是相互对立的