2. 外语
  3. The colors and patterns on butterflies’ wings may seem merely (i)______but they are actually (ii)______the survival of these ins

The colors and patterns on butterflies’ wings may seem merely (i)______but they are actually (ii)______the survival of these ins

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问题 The colors and patterns on butterflies’ wings may seem merely (i)______but they are actually (ii)______the survival of these insects , enabling them to attract mates and to hide from predators.
选项
答案C，E
解析 but说明前后反义重复；逗号说明前后同义重复。两空联动，反义重复；第二空与enabling them to attract mates and to hide from predators(帮助它们吸引异性并躲避捕食者)同义重复。根据句意，第一空说蝴蝶翅膀上的颜色和图案“不重要”，第二空说“重要”。artificial人工的，unique独一无二的，decorative装饰性的；result of……的结果，instrumental in作为重要工具的，precursor of……的先驱。答案选CE.
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