2. 外语
  3. A、Some animals and plants depend on each other for existence. B、Some animals and plants develop their relationship easily. C、Som

A、Some animals and plants depend on each other for existence. B、Some animals and plants develop their relationship easily. C、Som

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问题
选项 A、Some animals and plants depend on each other for existence.
B、Some animals and plants develop their relationship easily.
C、Some plants depend on each other for food.
D、Some animals live better together.
答案A
解析 主旨大意题。从文章第二段最后两句，In their skins... needs to breathe．If the plants are killed...the corals will die．说明了动物和植物之间相互依赖的生存关系。
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