食人鱼是脂鲤目脂鲤科锯脂鲤属鱼类的统称，是南美洲食肉的海水鱼。
“昨日只是今日的记忆，明日只是今日的梦想”是谁说的？（） ["泰戈尔","波德莱尔","纪伯伦","安纳德"]
科学本位突出表现在（）。 ["重视科学的学术性基础，忽视学生的生活基础","教学提出大量的假问题，学生缺乏发现真问题的能力","建构一个虚拟的应用世界，遮蔽了一幅真正的生活图景","强调面向学生的未来职业生活，却忽视学生现时的日常生活","突出科学在社会生产中的经济价值，而漠视个人生活中的科学常识"]
In a Cisco Unified Computing System， What is the "designated receiver" port in end-host mode used for？（） [" Sending all broadcasts"," Receiving all traffic from upstream switches"," Receiving broadcast traffic"," Negotiating spanning tree with upstream switches"," Learning MAC addresses from upstream switche"]
如果引种对象本身对于引入水域的生物是一种敌害生物，那么应持慎重的态度，以免破坏原有的生态平衡。
what is anycast address （Ipv6）？
