正确答案: C

抗原决定簇

题目：为防止甲型H1N1病毒在人群中的传播，有人建议接种人流感疫苗，接种人流感疫苗能够预防甲型H1N1流感的条件之一是：甲型H1N1病毒和人流感病毒具有相同的

解析：【解析】甲型H1N1病毒和人流感病毒具有相同的抗原决定簇，所以接种人流感疫苗能够预防甲型H1N1流感。故选C。

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举一反三的答案和解析：

[单选题]ASocieties all over the world name places in similar ways. Quite often there is no official naming ceremony but places tend to be called names as points of reference by people. Then an organized body steps in and gives the place a name. Frequently it happens that a place has two names: One is named by the people and the other by the government. As in many areas, old habits died hard, and the place continues to be called by its unofficial name long after the meaning is lost.

many places tend to have more than one name

[单选题]听第10段材料，回答第17至20题。第17题：What does Mr Henry Stone do?

A writer

[单选题]大白菜的属名为( )，种名为pekinensis。

Brassica