C(2025·江苏徐州二模)
When you eat something, your stomach breaks down its large molecules(分子) into smaller ones. Many people like to eat pineapples(菠萝). So when you eat pineapples, they can “eat” you by breaking down the molecules in your body. Pineapples have certain enzymes(酶) that can break down proteins(蛋白质). Many smaller molecules like the pearls (珍珠) come together to form the long pearl necklace of a protein. You can cut a necklace with scissors. In the same way, the enzymes in pineapples “cut up” proteins.
All living things have proteins. They are an important part of the cells(细胞) in your body. If an enzyme can break down a protein, it can break down cells as well. So will the cells of your tongue(舌头) when you eat pineapples. This is why your mouth will hurt if you eat too many pineapples.
But luckily, the cells in your tongue cure itself fast. And after you have swallowed the pineapple, the special enzymes will be broken down by your stomach. They won't “eat” you any more.
Why do pineapples have these enzymes? Some scientists believe that they are created by the pineapple to prevent animals from eating its fruits before they are ripe(成熟的). Once the fruit is ripe, its enzymes won't hurt an animal's tongue and the fruit will be okay to eat.
Another reason is that the enzymes help the seed(种子) to grow up. They play an important role in sending messages to the cells of the plant. These messages tell the cells when to start and stop growing. Without these enzymes, the seed may not be able to properly develop.
(
A. scissors
B. necklaces
C. proteins
D. pearls
(
A. The meat went bad so he it out after he tasted it.
B. This kind of pill should be whole, with some warm water.
C. The blackboard should be by the students on duty before class.
D. The stars from behind the clouds, shining directly into my house.
(
A. When the pineapple “beats” stomach
B. What the important body part is
C. Why the pineapple has enzymes
D. When people eat a pineapple
(
A. Proteins play the most important role in the body.
B. Some fruits have certain self-protection skills.
C. Pineapples are not healthy fruit.
D. Enzymes are harmful to pineapples.
When you eat something, your stomach breaks down its large molecules(分子) into smaller ones. Many people like to eat pineapples(菠萝). So when you eat pineapples, they can “eat” you by breaking down the molecules in your body. Pineapples have certain enzymes(酶) that can break down proteins(蛋白质). Many smaller molecules like the pearls (珍珠) come together to form the long pearl necklace of a protein. You can cut a necklace with scissors. In the same way, the enzymes in pineapples “cut up” proteins.
All living things have proteins. They are an important part of the cells(细胞) in your body. If an enzyme can break down a protein, it can break down cells as well. So will the cells of your tongue(舌头) when you eat pineapples. This is why your mouth will hurt if you eat too many pineapples.
But luckily, the cells in your tongue cure itself fast. And after you have swallowed the pineapple, the special enzymes will be broken down by your stomach. They won't “eat” you any more.
Why do pineapples have these enzymes? Some scientists believe that they are created by the pineapple to prevent animals from eating its fruits before they are ripe(成熟的). Once the fruit is ripe, its enzymes won't hurt an animal's tongue and the fruit will be okay to eat.
Another reason is that the enzymes help the seed(种子) to grow up. They play an important role in sending messages to the cells of the plant. These messages tell the cells when to start and stop growing. Without these enzymes, the seed may not be able to properly develop.
(
A
)8. 新考法 In Paragraph 1, the enzymes in pineapples are compared to(被比作) .A. scissors
B. necklaces
C. proteins
D. pearls
(
B
)9. 新考法 The underlined word “swallowed” in Paragraph 3 can be put in Sentence .A. The meat went bad so he it out after he tasted it.
B. This kind of pill should be whole, with some warm water.
C. The blackboard should be by the students on duty before class.
D. The stars from behind the clouds, shining directly into my house.
(
C
)10. 新考法 According to the passage, what can be put in the blank to complete the following mind map?A. When the pineapple “beats” stomach
B. What the important body part is
C. Why the pineapple has enzymes
D. When people eat a pineapple
(
B
)11. What can we infer(推断) from the passage?A. Proteins play the most important role in the body.
B. Some fruits have certain self-protection skills.
C. Pineapples are not healthy fruit.
D. Enzymes are harmful to pineapples.
答案：三、8. A 【点拨】根据第一段中“You can cut a necklace with scissors. In the same way, the enzymes in pineapples ‘cut up’ proteins.”可知选 A。
9. B 【点拨】根据第三段中“And after you have swallowed the pineapple, the special enzymes will be broken down by your stomach.”可推知，画线词表示“吞下”。故选 B。
10. C 【点拨】通读全文可知，文章开头引入主题，介绍菠萝中的酶能够分解蛋白质；接着是主体部分，第二、三段介绍了菠萝如何“吃掉”你，最后两段介绍了菠萝为何含有酶。故选 C。
11. B 【点拨】根据第四段内容可知，一些水果有某些自我保护技能。故选 B。
9. B 【点拨】根据第三段中“And after you have swallowed the pineapple, the special enzymes will be broken down by your stomach.”可推知，画线词表示“吞下”。故选 B。
10. C 【点拨】通读全文可知，文章开头引入主题，介绍菠萝中的酶能够分解蛋白质；接着是主体部分，第二、三段介绍了菠萝如何“吃掉”你，最后两段介绍了菠萝为何含有酶。故选 C。
11. B 【点拨】根据第四段内容可知，一些水果有某些自我保护技能。故选 B。
解析：
翻译:
（2025·江苏徐州二模）
当你吃东西时，你的胃会把食物的大分子分解成小分子。很多人喜欢吃菠萝。所以当你吃菠萝时，菠萝也能通过分解你体内的分子来“吃”你。菠萝含有某些能分解蛋白质的酶。许多像珍珠一样的小分子聚集在一起，就形成了蛋白质这条长长的“珍珠项链”。你可以用剪刀剪断一条项链。同样地，菠萝中的酶能“剪断”蛋白质。
所有生物都含有蛋白质。它们是你身体细胞的重要组成部分。如果一种酶能分解蛋白质，它也能分解细胞。当你吃菠萝时，你舌头的细胞也会被分解。这就是为什么如果你吃太多菠萝，你的嘴会疼的原因。
但幸运的是，你舌头的细胞能很快自我修复。而且在你吞下菠萝后，这种特殊的酶会被你的胃分解。它们就不会再“吃”你了。
为什么菠萝会有这些酶呢？一些科学家认为，这些酶是菠萝产生的，目的是防止动物在它的果实成熟前就吃掉果实。一旦果实成熟，它的酶就不会伤害动物的舌头，果实也就可以被食用了。
另一个原因是这些酶有助于种子生长。它们在向植物细胞传递信息方面起着重要作用。这些信息会告诉细胞何时开始生长、何时停止生长。没有这些酶，种子可能无法正常发育。
8. 新考法 在第一段中，菠萝中的酶被比作______。
A. 剪刀
B. 项链
C. 蛋白质
D. 珍珠
9. 新考法 第三段中划线的单词“swallowed”可以放入句子______中。
A. 肉变质了，所以他尝了之后把它______了出来。
B. 这种药丸应该和一些温水一起被______。
C. 黑板应该在课前被值日的学生______。
D. 星星从云层后面______出来，直接照进我的房子里。
10. 新考法 根据文章，下列哪一项可以填入空白处来完成下面的思维导图？
A. 当菠萝“打败”胃时
B. 重要的身体部位是什么
C. 菠萝为什么有酶
D. 人们什么时候吃菠萝
11. 我们能从文章中推断出什么？
A. 蛋白质在身体中起着最重要的作用。
B. 一些水果有一定的自我保护技能。
C. 菠萝不是健康的水果。
D. 酶对菠萝有害。
（2025·江苏徐州二模）
当你吃东西时，你的胃会把食物的大分子分解成小分子。很多人喜欢吃菠萝。所以当你吃菠萝时，菠萝也能通过分解你体内的分子来“吃”你。菠萝含有某些能分解蛋白质的酶。许多像珍珠一样的小分子聚集在一起，就形成了蛋白质这条长长的“珍珠项链”。你可以用剪刀剪断一条项链。同样地，菠萝中的酶能“剪断”蛋白质。
所有生物都含有蛋白质。它们是你身体细胞的重要组成部分。如果一种酶能分解蛋白质，它也能分解细胞。当你吃菠萝时，你舌头的细胞也会被分解。这就是为什么如果你吃太多菠萝，你的嘴会疼的原因。
但幸运的是，你舌头的细胞能很快自我修复。而且在你吞下菠萝后，这种特殊的酶会被你的胃分解。它们就不会再“吃”你了。
为什么菠萝会有这些酶呢？一些科学家认为，这些酶是菠萝产生的，目的是防止动物在它的果实成熟前就吃掉果实。一旦果实成熟，它的酶就不会伤害动物的舌头，果实也就可以被食用了。
另一个原因是这些酶有助于种子生长。它们在向植物细胞传递信息方面起着重要作用。这些信息会告诉细胞何时开始生长、何时停止生长。没有这些酶，种子可能无法正常发育。
8. 新考法 在第一段中，菠萝中的酶被比作______。
A. 剪刀
B. 项链
C. 蛋白质
D. 珍珠
9. 新考法 第三段中划线的单词“swallowed”可以放入句子______中。
A. 肉变质了，所以他尝了之后把它______了出来。
B. 这种药丸应该和一些温水一起被______。
C. 黑板应该在课前被值日的学生______。
D. 星星从云层后面______出来，直接照进我的房子里。
10. 新考法 根据文章，下列哪一项可以填入空白处来完成下面的思维导图？
A. 当菠萝“打败”胃时
B. 重要的身体部位是什么
C. 菠萝为什么有酶
D. 人们什么时候吃菠萝
11. 我们能从文章中推断出什么？
A. 蛋白质在身体中起着最重要的作用。
B. 一些水果有一定的自我保护技能。
C. 菠萝不是健康的水果。
D. 酶对菠萝有害。