能提高苯妥英钠等抗癫痫药作用的中药是
A．芍药
B．甘草
C．石菖蒲
D．当归
E．刺五加
参考答案：C
Last summer holidays, he went to the countryside and worked together with farmers.In this way
he learnt________from farmers. [ ]
A. a great many
B. a great deal
C. scores of
D. much more
影响欧洲中世纪科学发展最重要的社会力量除僧侣政治和行 * * 力（）外，还有第三种力量就是（）
