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阅读以下短文，从每小题所给的A、B、C、D四个选项中，选出一个与短文内容相符的最佳选项。
You might think rocks are just boring stones under your feet. But some special stones discovered on Mars could lead to a huge discovery! They might be connected to a big secret: alien life.
NASA’s Perseverance rover(毅力号) has been a busy explorer on Mars since 2021. It has travelled across the planet to search for signs of life. The rover is about the size of a car and carries many scientific tools. One day, it found some strange rocks in an area called Jezero Crater. Scientists believe this area was once an ancient lake billions of years ago. These rocks have lots of tiny dots on them. Researchers call these patterns “leopard spots(豹纹斑点) ” because they look just like the dots on a wild cat.
Why are these spots such a big deal? On Earth, these kinds of markings are often made by tiny living things that are too small to see without a microscope(显微镜). They have lived on our planet for billions of years and can survive in very difficult conditions, such as hot springs and deep ocean floors. This discovery doesn’t mean aliens are walking on Mars today. Instead, the spots suggest that billions of years ago, Mars was a warmer place with water and an atmosphere(大气层). The planet might have been a perfect home for tiny life!
One space scientist said these rocks gave us “something to chase”. However, we aren’t 100% sure yet. There could be other explanations for these strange patterns. To find the answer, NASA plans to bring them back to Earth for further study around 2033. Scientists will examine them carefully in laboratories using special equipment. If these “leopard spots” really were made by ancient Martian microbes, it would be one of the biggest and most exciting discoveries in human history!
(
A. A cold surface with ice and strong winds.
B. A warmer environment with water and an atmosphere.
C. Warm springs and dry floors like other planets.
D. Many different animals and plants living on its surface.
(
A. Because they look like the dots on a wild cat.
B. Because they were discovered by a scientist named Leopard.
C. Because leopards once lived on Mars.
D. Because the rocks are as big as leopards.
(
A. It is a very cold place today.
B. It may have had water in the past.
C. It is the largest area on Mars.
D. It has many living microbes now.
(
A. To sell them to museums.
B. To show them to the public.
C. To study them more carefully.
D. To prove that Mars is dangerous.
(
A. How NASA built the Perseverance rover.
B. The history of space exploration.
C. Why tiny living things can survive in difficult conditions.
D. The special rocks on Mars may suggest ancient life.
You might think rocks are just boring stones under your feet. But some special stones discovered on Mars could lead to a huge discovery! They might be connected to a big secret: alien life.
NASA’s Perseverance rover(毅力号) has been a busy explorer on Mars since 2021. It has travelled across the planet to search for signs of life. The rover is about the size of a car and carries many scientific tools. One day, it found some strange rocks in an area called Jezero Crater. Scientists believe this area was once an ancient lake billions of years ago. These rocks have lots of tiny dots on them. Researchers call these patterns “leopard spots(豹纹斑点) ” because they look just like the dots on a wild cat.
Why are these spots such a big deal? On Earth, these kinds of markings are often made by tiny living things that are too small to see without a microscope(显微镜). They have lived on our planet for billions of years and can survive in very difficult conditions, such as hot springs and deep ocean floors. This discovery doesn’t mean aliens are walking on Mars today. Instead, the spots suggest that billions of years ago, Mars was a warmer place with water and an atmosphere(大气层). The planet might have been a perfect home for tiny life!
One space scientist said these rocks gave us “something to chase”. However, we aren’t 100% sure yet. There could be other explanations for these strange patterns. To find the answer, NASA plans to bring them back to Earth for further study around 2033. Scientists will examine them carefully in laboratories using special equipment. If these “leopard spots” really were made by ancient Martian microbes, it would be one of the biggest and most exciting discoveries in human history!
(
B
) 1. What conditions did Mars likely have billions of years ago according to the passage?A. A cold surface with ice and strong winds.
B. A warmer environment with water and an atmosphere.
C. Warm springs and dry floors like other planets.
D. Many different animals and plants living on its surface.
(
A
) 2. Why do researchers call the patterns on the rocks “leopard spots”?A. Because they look like the dots on a wild cat.
B. Because they were discovered by a scientist named Leopard.
C. Because leopards once lived on Mars.
D. Because the rocks are as big as leopards.
(
B
) 3. What can we infer about Jezero Crater from the passage?A. It is a very cold place today.
B. It may have had water in the past.
C. It is the largest area on Mars.
D. It has many living microbes now.
(
C
) 4. What is the purpose of bringing the samples back to Earth?A. To sell them to museums.
B. To show them to the public.
C. To study them more carefully.
D. To prove that Mars is dangerous.
(
D
) 5. What is the passage mainly about?A. How NASA built the Perseverance rover.
B. The history of space exploration.
C. Why tiny living things can survive in difficult conditions.
D. The special rocks on Mars may suggest ancient life.
答案
1. B 2. A 3. B 4. C 5. D
解析
【分析】
做此类英语阅读理解题时，首先通读短文把握核心内容，再针对每道题的题干关键词，回到原文定位相关语句，将原文信息与选项逐一比对，排除与原文不符的干扰项，最终选出与短文内容相符的最佳选项。
【解析】
1. 题干问火星数十亿年前的条件，定位到原文第三段最后一句“Instead, the spots suggest that billions of years ago, Mars was a warmer place with water and an atmosphere.”，与选项B完全匹配，故选B。
2. 题干问为何称岩石上的图案为“豹纹斑点”，定位到原文第二段最后一句“Researchers call these patterns “leopard spots” because they look just like the dots on a wild cat.”，对应选项A，故选A。
3. 题干问Jezero Crater的相关信息，定位到原文第二段“Scientists believe this area was once an ancient lake billions of years ago.”，说明该区域过去有水，对应选项B，故选B。
4. 题干问将样本带回地球的目的，定位到原文第四段“To find the answer, NASA plans to bring them back to Earth for further study... Scientists will examine them carefully...”，目的是进一步研究，对应选项C，故选C。
5. 题干问短文主旨，全文围绕火星上的特殊岩石可能暗示古代生命展开，对应选项D，故选D。
【答案】
1. B 2. A 3. B 4. C 5. D
【知识点】
英语阅读理解，细节理解题，主旨大意题
【点评】
本文是一篇关于火星探索的科普类英语阅读材料，题型涵盖细节理解和主旨大意，考查学生快速定位原文信息、归纳主旨的能力，内容贴近科技热点，难度适中。
【难度系数】
0.3
做此类英语阅读理解题时，首先通读短文把握核心内容，再针对每道题的题干关键词，回到原文定位相关语句，将原文信息与选项逐一比对，排除与原文不符的干扰项，最终选出与短文内容相符的最佳选项。
【解析】
1. 题干问火星数十亿年前的条件，定位到原文第三段最后一句“Instead, the spots suggest that billions of years ago, Mars was a warmer place with water and an atmosphere.”，与选项B完全匹配，故选B。
2. 题干问为何称岩石上的图案为“豹纹斑点”，定位到原文第二段最后一句“Researchers call these patterns “leopard spots” because they look just like the dots on a wild cat.”，对应选项A，故选A。
3. 题干问Jezero Crater的相关信息，定位到原文第二段“Scientists believe this area was once an ancient lake billions of years ago.”，说明该区域过去有水，对应选项B，故选B。
4. 题干问将样本带回地球的目的，定位到原文第四段“To find the answer, NASA plans to bring them back to Earth for further study... Scientists will examine them carefully...”，目的是进一步研究，对应选项C，故选C。
5. 题干问短文主旨，全文围绕火星上的特殊岩石可能暗示古代生命展开，对应选项D，故选D。
【答案】
1. B 2. A 3. B 4. C 5. D
【知识点】
英语阅读理解，细节理解题，主旨大意题
【点评】
本文是一篇关于火星探索的科普类英语阅读材料，题型涵盖细节理解和主旨大意，考查学生快速定位原文信息、归纳主旨的能力，内容贴近科技热点，难度适中。
【难度系数】
0.3
