① Is the sky bluer in autumn than in summer? The answer is yes! There are real reasons for this.
② The sun is lower in the sky in autumn. As the days get shorter, the sun appears lower and lower in the sky. It doesn't shine directly on our horizon. Instead, it is closer to the earth and more blue light is scattered(散射). This makes the sky seem bluer.
③ In autumn, there is less water in the air, so there are fewer clouds. Autumn is known for good weather—cooler temperatures and less wet air. The air does not hold much water, so clouds do not form easily. When there are few or no clouds covering the sky, the blue colour of the sky shows more clearly, and the sky looks more open and brighter.
④ You might be surprised, but the colourful leaves of autumn actually help give the sky's blueness a colour boost(增强), which can make the sky seem even bluer. If you've made a colour wheel for an art class, you know that blue and orange are opposite colours that look good together. The red, orange, and gold leaves of autumn make the blue sky stand out beautifully against them. This contrast looks nice and creates a special autumn view.
⑤ So, the next time you're out enjoying the beautiful weather in autumn, take a moment to look up at the sky. Remember these reasons why it looks so blue and enjoy the view!
任务一 回答问题(每题答案不超过8个词)
1. Why is the sky bluer in autumn? Give one reason.
2. How do colourful leaves help the sky?
3. What is autumn famous for?
4. What is the passage mainly about?
5. Do you know other scientific phenomena that happen during the changes of seasons? Give one example.
任务二 阅读理解
1. (创新考法·图片理解)Which one shows the relationship between the water in the air (x) and the blue colour of the sky (y)?
2. (创新考法·篇章结构)What is the structure of the passage?
② The sun is lower in the sky in autumn. As the days get shorter, the sun appears lower and lower in the sky. It doesn't shine directly on our horizon. Instead, it is closer to the earth and more blue light is scattered(散射). This makes the sky seem bluer.
③ In autumn, there is less water in the air, so there are fewer clouds. Autumn is known for good weather—cooler temperatures and less wet air. The air does not hold much water, so clouds do not form easily. When there are few or no clouds covering the sky, the blue colour of the sky shows more clearly, and the sky looks more open and brighter.
④ You might be surprised, but the colourful leaves of autumn actually help give the sky's blueness a colour boost(增强), which can make the sky seem even bluer. If you've made a colour wheel for an art class, you know that blue and orange are opposite colours that look good together. The red, orange, and gold leaves of autumn make the blue sky stand out beautifully against them. This contrast looks nice and creates a special autumn view.
⑤ So, the next time you're out enjoying the beautiful weather in autumn, take a moment to look up at the sky. Remember these reasons why it looks so blue and enjoy the view!
任务一 回答问题(每题答案不超过8个词)
1. Why is the sky bluer in autumn? Give one reason.
Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. How do colourful leaves help the sky?
They make the sky stand out.
3. What is autumn famous for?
Good cool dry weather.
4. What is the passage mainly about?
Why the autumn sky is bluer.
5. Do you know other scientific phenomena that happen during the changes of seasons? Give one example.
Yes. Frost forming in autumn.(言之有理即可)
任务二 阅读理解
1. (创新考法·图片理解)Which one shows the relationship between the water in the air (x) and the blue colour of the sky (y)?
2. (创新考法·篇章结构)What is the structure of the passage?
答案：任务一
1. Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. They make the sky stand out.
3. Good cool dry weather.
4. Why the autumn sky is bluer.
5. Yes. Frost forming in autumn.(言之有理即可)
任务二
1. B 图片理解题。根据“The air does not hold much water, so clouds do not form easily. When there are few or no clouds covering the sky, the blue colour of the sky shows more clearly, and the sky looks more open and brighter.”可知,空气中没有多少水分,所以云不容易形成。当很少或没有云覆盖天空时,天空的蓝色更明显,天空看起来更开阔、更明亮。由此可知,空气中的水分越少,天空的蓝色越明显,即空气中的水分越多,天空的蓝色越不明显。
2. A 篇章结构题。通读全文可知,第一段提出了问题并给出了直接的答案;第二、三、四段分别解释了三个原因;第五段鼓励读者在秋天欣赏美丽的天空,并记住这些原因。
1. Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. They make the sky stand out.
3. Good cool dry weather.
4. Why the autumn sky is bluer.
5. Yes. Frost forming in autumn.(言之有理即可)
任务二
1. B 图片理解题。根据“The air does not hold much water, so clouds do not form easily. When there are few or no clouds covering the sky, the blue colour of the sky shows more clearly, and the sky looks more open and brighter.”可知,空气中没有多少水分,所以云不容易形成。当很少或没有云覆盖天空时,天空的蓝色更明显,天空看起来更开阔、更明亮。由此可知,空气中的水分越少,天空的蓝色越明显,即空气中的水分越多,天空的蓝色越不明显。
2. A 篇章结构题。通读全文可知,第一段提出了问题并给出了直接的答案;第二、三、四段分别解释了三个原因;第五段鼓励读者在秋天欣赏美丽的天空,并记住这些原因。
解析：
【分析】
拿到这道阅读理解题，首先先明确解题思路：首先任务一的所有小题都可以通过回原文定位关键词找到对应信息，同时要严格遵守“答案不超过8个词”的要求，对原文内容做精简提炼，不要冗余表述；任务二的第1题需要先梳理题干里两个变量（空气中的水分、天空蓝色程度）的逻辑关系，结合原文内容推导二者的相关性再匹配正确图片；第2题需要逐段梳理段落功能，划分全文的逻辑结构，匹配对应的篇章结构示意图。做开放类小题时，只要举出符合季节变化规律的常见科学现象即可，不需要复杂表述。
【解析】
任务一解析
1. 回原文定位第②③④段，文本分别给出了太阳高度更低、云更少、彩色树叶衬托三个原因，任选其一精简到8词以内即可，符合要求的答案都正确。
2. 定位到第④段核心句“The red, orange, and gold leaves of autumn make the blue sky stand out beautifully against them”，直接提炼核心作用即可。
3. 定位到第③段“Autumn is known for good weather—cooler temperatures and less wet air”，把描述的天气特征精简合并即可。
4. 全文所有内容都围绕“秋天天空为什么更蓝”展开，直接提炼核心主旨即可。
5. 属于开放作答，举出任意符合季节变化的常见科学现象，表述通顺即可得分。
任务二解析
1. 根据第③段内容可知：空气中水分越多，云越容易形成，天空的蓝色就越不明显，二者呈负相关关系，对应正确选项为B。
2. 逐段梳理功能：第①段提出问题并给出肯定答案，属于总起引入；第②③④段分别从三个不同角度解释秋空更蓝的原因，属于分述部分；第⑤段收尾呼吁大家欣赏秋日蓝天，属于总结部分，对应篇章结构选项为A。
【答案】
任务一
1. Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. They make the sky stand out.
3. Good cool dry weather.
4. Why the autumn sky is bluer.
5. Yes. Frost forming in autumn.(言之有理即可)
任务二
1. B
2. A
【知识点】
阅读理解细节定位；篇章结构分析；主旨大意归纳
【点评】
本题在常规阅读细节考查的基础上加入了创新考法，既检验学生快速定位文本信息、精简提炼答案的能力，还融入了跨学科逻辑推导、篇章框架梳理的考点，开放小问也引导学生联系生活中的科学常识，整体考查维度很全面。
【难度系数】
0.6
拿到这道阅读理解题，首先先明确解题思路：首先任务一的所有小题都可以通过回原文定位关键词找到对应信息，同时要严格遵守“答案不超过8个词”的要求，对原文内容做精简提炼，不要冗余表述；任务二的第1题需要先梳理题干里两个变量（空气中的水分、天空蓝色程度）的逻辑关系，结合原文内容推导二者的相关性再匹配正确图片；第2题需要逐段梳理段落功能，划分全文的逻辑结构，匹配对应的篇章结构示意图。做开放类小题时，只要举出符合季节变化规律的常见科学现象即可，不需要复杂表述。
【解析】
任务一解析
1. 回原文定位第②③④段，文本分别给出了太阳高度更低、云更少、彩色树叶衬托三个原因，任选其一精简到8词以内即可，符合要求的答案都正确。
2. 定位到第④段核心句“The red, orange, and gold leaves of autumn make the blue sky stand out beautifully against them”，直接提炼核心作用即可。
3. 定位到第③段“Autumn is known for good weather—cooler temperatures and less wet air”，把描述的天气特征精简合并即可。
4. 全文所有内容都围绕“秋天天空为什么更蓝”展开，直接提炼核心主旨即可。
5. 属于开放作答，举出任意符合季节变化的常见科学现象，表述通顺即可得分。
任务二解析
1. 根据第③段内容可知：空气中水分越多，云越容易形成，天空的蓝色就越不明显，二者呈负相关关系，对应正确选项为B。
2. 逐段梳理功能：第①段提出问题并给出肯定答案，属于总起引入；第②③④段分别从三个不同角度解释秋空更蓝的原因，属于分述部分；第⑤段收尾呼吁大家欣赏秋日蓝天，属于总结部分，对应篇章结构选项为A。
【答案】
任务一
1. Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. They make the sky stand out.
3. Good cool dry weather.
4. Why the autumn sky is bluer.
5. Yes. Frost forming in autumn.(言之有理即可)
任务二
1. B
2. A
【知识点】
阅读理解细节定位；篇章结构分析；主旨大意归纳
【点评】
本题在常规阅读细节考查的基础上加入了创新考法，既检验学生快速定位文本信息、精简提炼答案的能力，还融入了跨学科逻辑推导、篇章框架梳理的考点，开放小问也引导学生联系生活中的科学常识，整体考查维度很全面。
【难度系数】
0.6