题目

---How about buying your mother some flowers for her birthday? ---_______. A. Enjoy yourself   B. No, I don’t know    C. No               D. Good idea 答案：D漂亮的雄鸟展示各种“舞姿”来吸引雌鸟的行为属于（ ）A．社群行为B．节律行为C．繁殖行为D．防御行为