知母来源于
A．百合科
B．泽泻科
C．天南星科
D．茜草科
E．兰科
参考答案：A
Miss Li asked a question, but it was ________ that nobody could answer it. [ ]
A. very diffcult
B. too diffcult
C. diffcult enough
D. so diffcult
有“曲状元”之称的元代作家是（）
A.郑光祖
B.王实甫
C.马致远
D.张养浩
