Which of these statements is true of clientless end-user devices？（） ["They do not receive unique IP addresses","RADIUS or LDAP is required in order to assign IP addresses","They are assigned addresses from the internal DHCP pool","Their traffic appears to originate from the originating host network"]
生物进化
某市为调查本月流感发病情况，选择n名居民为观察对象，观察期内有m发病，其中有q人曾被感染过两次，则期间流感的发病率为（）。 ["m\/n","n\/m","（m+q）\/n","m\/（n-q）"]
在单一的独立投资项目中，当一项投资方案的净现值小于零时，表明该方案（）。 ["获利指数小于1","不具备财务可行性","净现值率小于零","内含报酬率小于行业基准折现率","投资回收期小于基准回收期"]
DNA改组
知识迁移与应用的关系如何？
