入血分而清热凉血，治疗血热吐衄的药（）
A.石膏
B.桑叶
C.菊花
D.栀子
E.黄芩
参考答案：B, D, E
解决合同争议的最终手段是（）。
A．调解
B．协商
C．仲裁
D．诉讼
Much to our surprise, the witness's ________ of the traffic accident differed from the official version in several aspects.
A．account
B．opinion
C．instruction
D．explanation
