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Ⅳ. Read and answer the questions.
Only humans speak using words. But animals have their own special ways of communicating. You might know bees dance to share messages, or dogs bark differently to show friendliness or danger. But do you know about infrasonic(次声的) communication used by elephants? Let’s explore this wonder!
Humans hear sounds like music notes or thunder, but we can’t hear sounds lower than these. Elephants and hippos, however, can both make and hear these deep rumbles(振动)—called infrasound—which are too low for human ears.
High-pitched sounds ( like human voices ) don’t travel over several kilometres, through walls or forests. Infrasound, however, has superpowers! Its long waves easily travel through grass, trees, and even storms, reaching over 4 kilometres away. This lets elephant herds(兽群) stay connected even when not together.
Have you seen elephant herds suddenly run away for no reason? They likely heard faraway infrasonic sounds that humans couldn’t hear clearly. Even in zoos, you might feel infrasound! Stand near mother elephants and babies—every few minutes, you’ll sense a soft rumble in the air, like a quiet drumbeat. This is infrasonic communication—the mother elephants “talking” to their babies!
Next time you visit a zoo, listen ... with your whole body! While we can’t hear infrasound, we can feel its power. Elephants remind us that communication isn’t just about words—it’s about sensing the invisible connections around us.
(
A. By dancing like bees.
B. By using infrasound.
C. Through high-pitched barks.
D. By making loud thunder.
(
A. A storm blocking sound.
B. A human voice travelling in forests.
C. The elephant herd staying together.
D. Infrasound travelling over 4 kilometres.
(
A. Infrasound is very loud.
B. Elephants shout at visitors.
C. People can sense the rumbles.
D. Zoo walls stop the sound.
(
A. To compare different animal sounds.
B. To describe how elephants use ears.
C. To explain how elephants communicate.
D. To discuss why zoo elephants make sounds.
Only humans speak using words. But animals have their own special ways of communicating. You might know bees dance to share messages, or dogs bark differently to show friendliness or danger. But do you know about infrasonic(次声的) communication used by elephants? Let’s explore this wonder!
Humans hear sounds like music notes or thunder, but we can’t hear sounds lower than these. Elephants and hippos, however, can both make and hear these deep rumbles(振动)—called infrasound—which are too low for human ears.
High-pitched sounds ( like human voices ) don’t travel over several kilometres, through walls or forests. Infrasound, however, has superpowers! Its long waves easily travel through grass, trees, and even storms, reaching over 4 kilometres away. This lets elephant herds(兽群) stay connected even when not together.
Have you seen elephant herds suddenly run away for no reason? They likely heard faraway infrasonic sounds that humans couldn’t hear clearly. Even in zoos, you might feel infrasound! Stand near mother elephants and babies—every few minutes, you’ll sense a soft rumble in the air, like a quiet drumbeat. This is infrasonic communication—the mother elephants “talking” to their babies!
Next time you visit a zoo, listen ... with your whole body! While we can’t hear infrasound, we can feel its power. Elephants remind us that communication isn’t just about words—it’s about sensing the invisible connections around us.
(
B
)1. How do elephants communicate from far away?A. By dancing like bees.
B. By using infrasound.
C. Through high-pitched barks.
D. By making loud thunder.
(
D
)2. What does the underlined word “this” refer to in Paragraph 3?A. A storm blocking sound.
B. A human voice travelling in forests.
C. The elephant herd staying together.
D. Infrasound travelling over 4 kilometres.
(
C
)3. Why can people feel infrasound near elephants in zoos?A. Infrasound is very loud.
B. Elephants shout at visitors.
C. People can sense the rumbles.
D. Zoo walls stop the sound.
(
C
)4. What is the main purpose of the passage?A. To compare different animal sounds.
B. To describe how elephants use ears.
C. To explain how elephants communicate.
D. To discuss why zoo elephants make sounds.
答案
1. B 2. D 3. C 4. C
解析
【分析】本题为英语阅读理解题，需先通读全文把握主旨，再针对每道题的关键词回到原文定位，结合原文信息逐一分析选项，排除错误答案得出正确结论。
【解析】
1. 细节理解题：根据第二段及第三段内容，大象可通过发出和感知次声（infrasound）进行交流，且第三段提到次声可传播超4公里，能让象群远距离保持联系，对应选项B。A是蜜蜂的交流方式，C是狗的交流方式，D不符合原文表述，均排除。
2. 词义猜测题：第三段前文提到“Infrasound...reaching over 4 kilometres away”，后文说明“this”让象群即使不在一起也能保持联系，可知“this”指代“次声传播超4公里”的特性，对应选项D。
3. 细节理解题：根据第四段“you’ll sense a soft rumble in the air”，可知人们能感知到次声的振动，对应选项C。A错误，次声并不 loud；B无原文依据；D错误，与动物园围墙无关，均排除。
4. 主旨大意题：全文围绕大象如何利用次声进行交流展开，介绍了次声的特性及大象的交流方式，对应选项C。A未重点对比不同动物声音；B未围绕大象耳朵展开；D不是讨论动物园大象发声的原因，均排除。
【答案】1.B 2.D 3.C 4.C
【知识点】英语阅读理解、细节理解、主旨大意
【点评】本文是一篇介绍大象次声交流的英语阅读材料，题型涵盖细节理解、词义猜测、主旨大意，要求学生具备快速定位原文信息、理解指代关系及归纳主旨的能力，难度适中。
【难度系数】0.3
【解析】
1. 细节理解题：根据第二段及第三段内容，大象可通过发出和感知次声（infrasound）进行交流，且第三段提到次声可传播超4公里，能让象群远距离保持联系，对应选项B。A是蜜蜂的交流方式，C是狗的交流方式，D不符合原文表述，均排除。
2. 词义猜测题：第三段前文提到“Infrasound...reaching over 4 kilometres away”，后文说明“this”让象群即使不在一起也能保持联系，可知“this”指代“次声传播超4公里”的特性，对应选项D。
3. 细节理解题：根据第四段“you’ll sense a soft rumble in the air”，可知人们能感知到次声的振动，对应选项C。A错误，次声并不 loud；B无原文依据；D错误，与动物园围墙无关，均排除。
4. 主旨大意题：全文围绕大象如何利用次声进行交流展开，介绍了次声的特性及大象的交流方式，对应选项C。A未重点对比不同动物声音；B未围绕大象耳朵展开；D不是讨论动物园大象发声的原因，均排除。
【答案】1.B 2.D 3.C 4.C
【知识点】英语阅读理解、细节理解、主旨大意
【点评】本文是一篇介绍大象次声交流的英语阅读材料，题型涵盖细节理解、词义猜测、主旨大意，要求学生具备快速定位原文信息、理解指代关系及归纳主旨的能力，难度适中。
【难度系数】0.3
