Mark Twain is mentioned in the passage in order to show that The word "genome" (line 1, paragraph 4) most probably means

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问题 Mark Twain is mentioned in the passage in order to show that
The word "genome" (line 1, paragraph 4) most probably means

选项 A、a particular human gene.
B、a DNA letter,
C、a bank of genes.
D、functional DNA letters.

答案C

解析 含义题。文章第四段第二句中的"it"指代"genome",这句话说"它由成百上千万的DNA字符组成",所以"genome"也就是"基因库"的意思。
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