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中考真题2025年山东省威海市完形填空-啄木鸟的 “防震” 秘诀
容易
难度
说明文
时文类型
动物
时文话题
大学
适合年级
奇速优课
Everything in the natural world works effectively (有效地). Take a look at woodpeckers, for example, and you’ll understand.
A woodpecker taps (轻叩) its head against wood nearly 12,000 times a day. Doing something like that all day long must hurt! Think of how you would feel if you hit your head against something ______ 1 ______ only once.
However, in nature, everything happens for a reason. Woodpeckers have long, sharp beaks which they use to make holes in trees to ______2 ______ tasty insects inside. Their special toes allow them to hold on tightly (紧紧地) as they bang their heads against trees. They also have a strong tail feather, which they use to keep their balance while they ______ 3 ______.
But how do woodpeckers ______ 4 ______ brain injuries (伤害)? One of the most interesting things about woodpeckers is their tongue. It is very long—sometimes twice as long as the bird itself. The woodpecker can wrap (包) its long tongue ______ 5 ______ its brain inside its head. Each time the bird hits a tree with its head, its tongue protects its brain from injury.
That’s ______ 6 ______ a woodpecker can tap all day long and not get a headache.
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