2. 外语
  3. Some scientists believe that Adelie penguins may be______of global warming, that their population decline may presage climatic c

Some scientists believe that Adelie penguins may be______of global warming, that their population decline may presage climatic c

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问题 Some scientists believe that Adelie penguins may be______of global warming, that their population decline may presage climatic changes throughout Antarctic.
选项
答案D，E
解析 逗号说明前后同义重复。空格与presage(预兆)同义重复。figment幻觉，purveyor供应者，derivative衍生物，herald预兆，harbinger预兆，by-product副产品。答案选DE。注：这里derivative和by—product是干扰项，同表示“副产品”。
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