当前位置: 初中英语 /
  • 1. (2019·东莞模拟) 阅读短文,从每小题所给的四个选项中,选出能回答所提问题或完成所给句子的最佳答案。

        For us humans, one of the greatest experiences is to taste all kinds of delicious food. But for penguins, they cannot get a taste of this happiness. That's because penguins can't actually taste the delicious flavors (味道) of their favorite food-fish!

        Scientists from the University of Michigan examined the genome (基因组)of five species of penguins. They found that no one can taste umami (鲜味),the flavor of meat or fish, the BBC reported.

        Many animals have five basic tastes: sweet, sour, salty, bitter and umami. But according to genetic data, penguins are believed to have only sour and salty tastes.

        These findings are surprising and puzzling. And scientists don't have a good explanation for them. But they have a few ideas.

        First, one of the umami genes doesn't work in cold temperatures. "It's about zero degrees when they eat cold fish," Zhang Jianzhi, the lead scientist, told the Daily Mail, so even if the penguins had a functional (功能的)gene, it might not work when they needed it.

        Second, penguins' tongues (舌头) are very special which may have something to do with their lack of taste. Instead of being covered with taste buds which help to taste food, penguins' tongues are very spiky. This is better for them to hold slippery (滑的) fish than tasting them. One study even showed that some types of penguins don't even have taste buds.

        However, penguins seem to be managing just fine.

        "Their behavior of swallowing food whole, and their tongue structure and function, suggest that penguins need no taste perception," said Zhang.

    1. (1) How many tastes do penguins have?
      A . Four B . Three C . Two D . Five.
    2. (2) From the passage, we can learn that ________.
      A . temperatures can decide the umami genes of penguins B . the umami genes in penguins would work when needed C . penguins' umami genes work well in cold temperatures D . penguins' tongues are very slippery
    3. (3) The underlined word spiky means ________.
      A . 圆滑的 B . 美味的 C . 钉子似的 D . 软绵绵的
    4. (4) All of the following decide that penguins need no taste perception EXCEPT ________.
      A . they always swallow food whole B . they live in cold temperatures C . their tongue function is different D . their tongue structure is special
    5. (5) The study finds that ________.
      A . different penguins have their own favorite fish B . penguins have different genomes for the five tastes C . penguins don't have any of the five basic tastes D . penguins can't taste the flavor of fish

微信扫码预览、分享更方便