2. 外语
  3. A is found to be a great deal higher than that of seawater B was of little scientific value C may be older than that collected b

A is found to be a great deal higher than that of seawater B was of little scientific value C may be older than that collected b

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问题 A is found to be a great deal higher than that of seawater
B was of little scientific value
C may be older than that collected below 39 feet of ice
D might have come from Mars
E is to collect some briny lake water for analysis
F may return to life sooner than microbes frozen in the surface ice
Scientists expect that the life, if found in deeper water below the ice sheet,
选项
答案C
解析 选C的依据见第三段第一句。
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