2. 外语
  3. Although the Arctic looks lifeless, there are animals moving about. Caribou travel up and down feeding on the grass beneath the

Although the Arctic looks lifeless, there are animals moving about. Caribou travel up and down feeding on the grass beneath the

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问题     Although the Arctic looks lifeless, there are animals moving about. Caribou travel up and down feeding on the grass beneath the snow. The polar bears have a thick, waterproof coat. They eat birds’ eggs, berries and dead whales. Walruses get shellfish from the ocean with their tusks. Seals have a layer of fat to keep them warm. They like to eat fish.
    The main idea of the paragraph is that although the【46】looks lifeless, there are a number of【47】there.
    Walruses get【48】from the ocean with their【49】.
    Seals have a【50】of fat to keep them warm.

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答案tusks
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