2. 外语
  3. PASSAGE TWO What does the word "lineage" in the last paragraph mean?

PASSAGE TWO What does the word "lineage" in the last paragraph mean?

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问题 PASSAGE TWO
What does the word "lineage" in the last paragraph mean?
选项
答案Strain．
解析 根据lineage前面的other可知该句应与前一句并列，上文提到HIV的M群是导致艾滋病传染的主要菌株(main strain of the virus)，再结合修饰lineages的定语从句that could pose risks…，可知lineage在此处是strain之义，故答案为Strain。
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