具有清实热、退虚热功效的药物是（）
A.石膏
B.知母
C.黄芩
D.苦参
E.栀子
参考答案：B
求整式3a+2b+1减去2a-3b的差是 .
In relation to the law of obligations:
(b) Explain and distinguish the meaning of tort and tortious liabilities from criminal liabilities. (7 marks)
