C
After the haircut
It's getting hot. You go to have your hair cut. The barber Tony cuts off part of your hair and sweeps it away, but your hair's journey is not over after the haircut.
Have you ever thought of planting your old hair after it's cut off? Some farmers do! What comes up? Not wigs(假发), but bigger and tastier crops. Hair is full of nitrogen(氮) that helps plants to grow. When the cut hair is mixed into soil, the hair breaks down, slowly letting out nitrogen. Then it can help flowers and vegetables get big a little faster.
If you've got a wool sweater on, you're wearing a sheep's haircut. Sheep grow fine curly (卷曲的) fur called wool. All those curls make air pockets that trap heat, keeping the sheep warm. Farmers shear the sheep in summer, so the sheep don't feel too hot. And we use the wool to make warm clothes, socks, and hats. Wool can even take in rain while remaining dry. Wool doesn't catch fire easily, either.
What does your hair say about you? Even many years after it has been cut off, hair still can tell surprising secrets because hair is composed of bits of old cells. It has traces(微量) of chemicals(化学物质) that were in body when the hair grew. When people are kept in the situation of dangerous chemicals, these traces remain in the hair, even long after they have disappeared from the body itself. Testing hair can help doctors know if there are dangerous chemicals in food and water. Hair can tell another important secret—whose hair is it? This can be used to help solve crimes.
Hair does so many things for us. It keeps us warm, helps farmers, shows mysteries, and provides endless styling fun. One thing is for sure—it's not just for wigs any more.
(
A. Nature. B. Science. C. History. D. Health.
(
A. Give enough food to the sheep. B. Wash the sheep many times.
C. Find a living place for the sheep. D. Cut the wool off the sheep.
(
A. Hair helps keep warm. B. Hair testing is important.
C. Hair can tell secrets. D. Hair helps solve crimes.
(
D
After the haircut
It's getting hot. You go to have your hair cut. The barber Tony cuts off part of your hair and sweeps it away, but your hair's journey is not over after the haircut.
Have you ever thought of planting your old hair after it's cut off? Some farmers do! What comes up? Not wigs(假发), but bigger and tastier crops. Hair is full of nitrogen(氮) that helps plants to grow. When the cut hair is mixed into soil, the hair breaks down, slowly letting out nitrogen. Then it can help flowers and vegetables get big a little faster.
If you've got a wool sweater on, you're wearing a sheep's haircut. Sheep grow fine curly (卷曲的) fur called wool. All those curls make air pockets that trap heat, keeping the sheep warm. Farmers shear the sheep in summer, so the sheep don't feel too hot. And we use the wool to make warm clothes, socks, and hats. Wool can even take in rain while remaining dry. Wool doesn't catch fire easily, either.
What does your hair say about you? Even many years after it has been cut off, hair still can tell surprising secrets because hair is composed of bits of old cells. It has traces(微量) of chemicals(化学物质) that were in body when the hair grew. When people are kept in the situation of dangerous chemicals, these traces remain in the hair, even long after they have disappeared from the body itself. Testing hair can help doctors know if there are dangerous chemicals in food and water. Hair can tell another important secret—whose hair is it? This can be used to help solve crimes.
Hair does so many things for us. It keeps us warm, helps farmers, shows mysteries, and provides endless styling fun. One thing is for sure—it's not just for wigs any more.
(
B
)8. In which part of a magazine can we probably read this passage?A. Nature. B. Science. C. History. D. Health.
(
D
)9. What does the underlined part "shear the sheep" mean?A. Give enough food to the sheep. B. Wash the sheep many times.
C. Find a living place for the sheep. D. Cut the wool off the sheep.
(
C
)10. What's the main idea of Paragraph 4?A. Hair helps keep warm. B. Hair testing is important.
C. Hair can tell secrets. D. Hair helps solve crimes.
(
A
)11. 创新考法—篇章结构题 How is the passage organized(组织)?D
答案：8. B 【点拨】文章主要介绍了头发的多种用途，应该是在杂志的科学版块能看到。故选B。
9. D 【点拨】根据“Farmers shear the sheep in summer, so the sheep don't feel too hot.”可知，此处是指农民为了让羊在夏天不感到太热而给羊剪毛。短语“shear the sheep”指的是“给羊剪毛”。故选D。
10. C 【点拨】第四段主要讲述了头发可以揭示许多秘密。故选C。
11. A 【点拨】通读全文可知，文章首段引出关于头发的话题；第二、三、四段分别介绍了头发的用途；最后一段进行总结。故选A。
9. D 【点拨】根据“Farmers shear the sheep in summer, so the sheep don't feel too hot.”可知，此处是指农民为了让羊在夏天不感到太热而给羊剪毛。短语“shear the sheep”指的是“给羊剪毛”。故选D。
10. C 【点拨】第四段主要讲述了头发可以揭示许多秘密。故选C。
11. A 【点拨】通读全文可知，文章首段引出关于头发的话题；第二、三、四段分别介绍了头发的用途；最后一段进行总结。故选A。
解析：
【分析】本题是篇章结构题，需通读全文梳理各段落的核心内容与逻辑关系，明确文章的结构框架，再结合选项判断正确答案。逐段分析：第一段引出剪发后头发的相关话题；第二段介绍剪下的头发可作为肥料帮助作物生长；第三段说明羊毛（羊的毛发）的作用与用途；第四段阐述头发能揭示秘密（如检测化学物质、协助破案）；最后一段总结头发的多种作用，据此判断文章结构符合对应选项的逻辑。
【解析】首先通读全文划分段落功能：①段引出话题；②段讲头发对农业的作用；③段讲羊毛的用途；④段讲头发的秘密功能；⑤段总结。整体结构为“引出话题→分述头发的不同用途→总结”，匹配选项A的结构，故选A。
【答案】A
【知识点】阅读理解（篇章结构）
【点评】本题考查学生对文章整体结构的分析能力，需梳理段落逻辑、把握文章框架，难度适中。
【难度系数】0.5
【解析】首先通读全文划分段落功能：①段引出话题；②段讲头发对农业的作用；③段讲羊毛的用途；④段讲头发的秘密功能；⑤段总结。整体结构为“引出话题→分述头发的不同用途→总结”，匹配选项A的结构，故选A。
【答案】A
【知识点】阅读理解（篇章结构）
【点评】本题考查学生对文章整体结构的分析能力，需梳理段落逻辑、把握文章框架，难度适中。
【难度系数】0.5