求助！！！！！！！！！！！！！！！！

yexianda

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?

DUKB24

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

yexianda

谢谢版主~