抑制GnRH分泌
A．雌激素B．孕激素C．雄激素D．促卵泡素E．黄体生成素
参考答案：B
求微分方程y"-5y’+6y=e2x的通解。
In relation to the Botswana legal system, explain:
(a) the meaning, scope and effectiveness of delegated legislation; (7 marks)
