Antigenic shift refers to the combination of two different strains of influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza. A. influenza; in contrast, antigenic drift refers to the natural mutation of a single strain of influenza B. influenza, different than the natural mutation of a single strain, known as antigenic drift C. influenza, in contrast to the natural mutation of a single strain, known as antigenic drift D. influenza, different than antigenic drift, which refers to the natural mutation of a single strain of influenza E. influenza; in contrast to antigenic drift, which refers to the natural mutation of a single strain of influenza 其它选项都知道错在哪，C选项是不是用Agentina shift与 the natural...进行比较了？怎样改就对了? -- by 会员 yexianda (2013/1/7 13:25:35)
这道是manhattan的题目？我貌似做过
C选项的确是比较对象错误了
应该是shift和drift两个名词所指代的不同概念的比较
把in contrast to后面改成drift，这个要比较的名词就行了 | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2013-1-7 13:25:35
收藏
收藏
楼主
