HIV基因编码（） A．反转录酶 B．蛋白酶 C．两者均是 D．两者均非

已知log₂3=m，试用m表示log₆9=______．

In relation to the Contract Law of China:

(b) state the rules that deal with the consequences where a contract is decided to be invalid. (6 marks)

简述治疗药物监测程序。