2 immune clone based multicast routing is proposed by combining the advantages of immune algorithm and clonal strategies 2 、结合免疫算法和克隆策略的优势，提出了免疫克隆多播路由算法。
2.
The teacher should take the prevent measure before the collaboration and take the way of supervision and control to solve the interpersonal conflict in the collaboration so that learning strategy can demonstrate the advantage in the best degree 教师在协作学习活动前应采取预防措施，活动中进行监控调节，能够基本化解人际冲突，从而最大限度地发挥协作学习策略的优势。
