C
【新素材】科普知识 You’ve probably heard your cats make a soft sound when they’re happy or resting in your arms. That’s called purring. But how and why do cats do it?
Scientists believe that when a cat’s brain sends a special message, the muscles in its throat(喉咙) start moving very fast—about 20 to 30 times per second! As the cat breathes, air passes through these muscles, creating the purring sound we hear.
Then why do cats purr? Scientists don’t yet fully understand the reason, but research suggests those sounds have different purposes.
The “Feed Me” Purr
Cats do purr when they are relaxed, but research shows they’ve developed different purring for different needs. A study found cats change purring when asking for food. “Their ‘hungry purr’ sounds different from their ‘happy purr’,” explains Dr Lauren Finka.
Another study found that hungry cats change their purring by adding a high-frequency(频率) sound similar to a human baby’s cry. “This trick makes people want to help them quickly,” said Dr Karen McComb. Cats hide their “feed me” message in a nice purring sound. It works better than loud miaowing. This shows how clever cats are at communicating with humans!
The Curing Purr
Scientists found something amazing—a cat’s purring vibrations(振动)(between 20 and 150 times per second) may help cure their bodies! Studies show these special sounds can help bones grow stronger and repair soft parts of the body. So when cats purr, they may be helping themselves feel better!
When researchers tested similar vibrations on mice, they found these vibrations help cure mice faster too. However, they don’t know exactly how this works. It hasn’t been fully tested on cats yet. Certainly, doctors don’t use this for human wounds.
Scientists haven’t found all the answers to cats’ purring, but one thing is clear—when your cat purrs, it’s always trying to tell you something important!
(
A. Loud.
B. Soft.
C. Clear.
D. Strong.
(
A. It miaows more loudly.
B. It cries with a human baby.
C. It makes lasting sounds.
D. It adds high-frequency sounds.
(
A. It is caused by fast stomach muscle movements.
B. It can help doctors to treat some human diseases.
C. It may tell important information to cats’ owners.
D. It has been completely understood by scientists.
(
A. Pets.
B. Food.
C. Health.
D. Fashion.
【新素材】科普知识 You’ve probably heard your cats make a soft sound when they’re happy or resting in your arms. That’s called purring. But how and why do cats do it?
Scientists believe that when a cat’s brain sends a special message, the muscles in its throat(喉咙) start moving very fast—about 20 to 30 times per second! As the cat breathes, air passes through these muscles, creating the purring sound we hear.
Then why do cats purr? Scientists don’t yet fully understand the reason, but research suggests those sounds have different purposes.
The “Feed Me” Purr
Cats do purr when they are relaxed, but research shows they’ve developed different purring for different needs. A study found cats change purring when asking for food. “Their ‘hungry purr’ sounds different from their ‘happy purr’,” explains Dr Lauren Finka.
Another study found that hungry cats change their purring by adding a high-frequency(频率) sound similar to a human baby’s cry. “This trick makes people want to help them quickly,” said Dr Karen McComb. Cats hide their “feed me” message in a nice purring sound. It works better than loud miaowing. This shows how clever cats are at communicating with humans!
The Curing Purr
Scientists found something amazing—a cat’s purring vibrations(振动)(between 20 and 150 times per second) may help cure their bodies! Studies show these special sounds can help bones grow stronger and repair soft parts of the body. So when cats purr, they may be helping themselves feel better!
When researchers tested similar vibrations on mice, they found these vibrations help cure mice faster too. However, they don’t know exactly how this works. It hasn’t been fully tested on cats yet. Certainly, doctors don’t use this for human wounds.
Scientists haven’t found all the answers to cats’ purring, but one thing is clear—when your cat purrs, it’s always trying to tell you something important!
(
B
)32. What kind of sound does a cat make when it is happy?A. Loud.
B. Soft.
C. Clear.
D. Strong.
(
D
)33. How does a cat change its purring when it is hungry?A. It miaows more loudly.
B. It cries with a human baby.
C. It makes lasting sounds.
D. It adds high-frequency sounds.
(
C
)34. From this passage, what do we know about cats’ purring?A. It is caused by fast stomach muscle movements.
B. It can help doctors to treat some human diseases.
C. It may tell important information to cats’ owners.
D. It has been completely understood by scientists.
(
A
)35. Which part of a magazine is the passage probably from?A. Pets.
B. Food.
C. Health.
D. Fashion.
答案：32. B 33. D 【解析】根据第五段中“Another study found that hungry cats change their purring by adding a high-frequency sound similar to a human baby's cry.”可知，当猫饥饿时，它们会在呼噜声中加入高频声音，类似于人类婴儿的哭声。 34. C 【解析】根据最后一段“Scientists haven't found all the answers to cats' purring, but one thing is clear—when your cat purrs, it's always trying to tell you something important!”可知，猫发出呼噜声时，总是在试图告诉主人一些重要的事情。 35. A
解析：
翻译:
C
【新素材】科普知识 你可能听过你的猫在开心或者在你怀里休息时发出轻柔的声音。那种声音叫做咕噜声。但是猫是如何以及为什么发出咕噜声的呢？
科学家们认为，当猫的大脑发出一种特殊的信号时，它喉咙里的肌肉开始快速运动——每秒大约20到30次！当猫呼吸时，空气穿过这些肌肉，就产生了我们听到的咕噜声。
那么猫为什么会发出咕噜声呢？科学家们还没有完全弄清楚原因，但研究表明这些声音有不同的作用。
“喂我”的咕噜声
猫在放松的时候会发出咕噜声，但研究表明它们会根据不同的需求发出不同的咕噜声。一项研究发现，猫在讨要食物时会改变咕噜声。“它们的‘饥饿咕噜声’和‘开心咕噜声’听起来不一样，”劳伦·芬卡博士解释道。
另一项研究发现，饥饿的猫会通过添加一种类似于人类婴儿哭声的高频声音来改变它们的咕噜声。“这个小把戏会让人们想要快速帮助它们，”卡伦·麦库姆博士说。猫把它们“喂我”的信息藏在好听的咕噜声里。这比大声喵喵叫更有效。这显示了猫在与人类交流方面是多么聪明！
具有治疗作用的咕噜声
科学家们发现了一件令人惊讶的事情——猫的咕噜声振动（每秒20到150次之间）可能有助于治愈它们的身体！研究表明这些特殊的声音可以帮助骨骼变得更强壮，并修复身体的软组织。所以当猫发出咕噜声时，它们可能是在帮助自己感觉好一点！
当研究人员在老鼠身上测试类似的振动时，他们发现这些振动也能更快地治愈老鼠。然而，他们还不完全清楚这是如何起作用的。这还没有在猫身上进行充分的测试。当然，医生也不会用这个来治疗人类的伤口。
科学家们还没有找到关于猫咕噜声的所有答案，但有一件事是清楚的——当你的猫发出咕噜声时，它总是试图告诉你一些重要的事情！
（ ）32. 猫开心的时候会发出什么样的声音？
A. 响亮的。
B. 轻柔的。
C. 清晰的。
D. 强烈的。
（ ）33. 猫饿的时候是如何改变它的咕噜声的？
A. 它喵喵叫得更大声。
B. 它和人类婴儿一起哭。
C. 它发出持续的声音。
D. 它添加高频声音。
（ ）34. 从这篇文章中，我们对猫的咕噜声有什么了解？
A. 它是由胃部肌肉快速运动引起的。
B. 它可以帮助医生治疗一些人类疾病。
C. 它可能会向猫的主人传达重要信息。
D. 它已经被科学家完全弄清楚了。
（ ）35. 这篇文章可能来自杂志的哪个部分？
A. 宠物。
B. 食物。
C. 健康。
D. 时尚。
C
【新素材】科普知识 你可能听过你的猫在开心或者在你怀里休息时发出轻柔的声音。那种声音叫做咕噜声。但是猫是如何以及为什么发出咕噜声的呢？
科学家们认为，当猫的大脑发出一种特殊的信号时，它喉咙里的肌肉开始快速运动——每秒大约20到30次！当猫呼吸时，空气穿过这些肌肉，就产生了我们听到的咕噜声。
那么猫为什么会发出咕噜声呢？科学家们还没有完全弄清楚原因，但研究表明这些声音有不同的作用。
“喂我”的咕噜声
猫在放松的时候会发出咕噜声，但研究表明它们会根据不同的需求发出不同的咕噜声。一项研究发现，猫在讨要食物时会改变咕噜声。“它们的‘饥饿咕噜声’和‘开心咕噜声’听起来不一样，”劳伦·芬卡博士解释道。
另一项研究发现，饥饿的猫会通过添加一种类似于人类婴儿哭声的高频声音来改变它们的咕噜声。“这个小把戏会让人们想要快速帮助它们，”卡伦·麦库姆博士说。猫把它们“喂我”的信息藏在好听的咕噜声里。这比大声喵喵叫更有效。这显示了猫在与人类交流方面是多么聪明！
具有治疗作用的咕噜声
科学家们发现了一件令人惊讶的事情——猫的咕噜声振动（每秒20到150次之间）可能有助于治愈它们的身体！研究表明这些特殊的声音可以帮助骨骼变得更强壮，并修复身体的软组织。所以当猫发出咕噜声时，它们可能是在帮助自己感觉好一点！
当研究人员在老鼠身上测试类似的振动时，他们发现这些振动也能更快地治愈老鼠。然而，他们还不完全清楚这是如何起作用的。这还没有在猫身上进行充分的测试。当然，医生也不会用这个来治疗人类的伤口。
科学家们还没有找到关于猫咕噜声的所有答案，但有一件事是清楚的——当你的猫发出咕噜声时，它总是试图告诉你一些重要的事情！
（ ）32. 猫开心的时候会发出什么样的声音？
A. 响亮的。
B. 轻柔的。
C. 清晰的。
D. 强烈的。
（ ）33. 猫饿的时候是如何改变它的咕噜声的？
A. 它喵喵叫得更大声。
B. 它和人类婴儿一起哭。
C. 它发出持续的声音。
D. 它添加高频声音。
（ ）34. 从这篇文章中，我们对猫的咕噜声有什么了解？
A. 它是由胃部肌肉快速运动引起的。
B. 它可以帮助医生治疗一些人类疾病。
C. 它可能会向猫的主人传达重要信息。
D. 它已经被科学家完全弄清楚了。
（ ）35. 这篇文章可能来自杂志的哪个部分？
A. 宠物。
B. 食物。
C. 健康。
D. 时尚。