高中 | 细节题 题目答案及解析
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高中 | 细节题题目答案及解析如下，仅供参考！
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细节题
The fact that your hair turns grey because of stress is nothing more than an old wives’ tale. It’s true that stress isn’t good for you, but it’s not going to turn you into a silver for just yet. In fact, the answer comes from the cells in your hair. These are what determine the color and eventually, the fade to grey.
Most of us start to notice our first grey hairs by the time we hit our thirties. A general rule to go by is that by the age of 50, half of the population will have lost the color in 50 percent of their hair.
But why does it happen? Firstly, we need to understand how hair gets its color.
Your hair is made up of cells called melanocytes (黑色素细胞) which produce pigments (色素) as they grow into th ehair fiber. There are two different types of melanins (黑色素): eumelanins (真黑色素) and pheomelanins (类黑色素). The former produces black and brown pigments, while the latter produces red and yellow pigments. The exact amount of these pigments determines whether a person has black, brown, blonde or red hair.
As we age, the ability of the melanocytes to produce more pigments weakens. That is because our hair grows in different phases.
The growing phase lasts between three and five years, after which our follicles (毛囊) turn off for about three months to rest and get ready to grow more hairs. This goes round and round and, after a time, our bodies aren’t as good at producing new hairs.
Scientists are continuing to try and find ways to prevent greying hair. A team of scientists in France is working to try and stop the melanocytes from being damaged at the end of each hair cycle. They are trying to use a special enzyme (酶) to protect the cells from damage. If successful, it could lead the way for new products that keep our locks full of color for years to come.
What does the phase “an old wives’ tale” in paragraph 1 probably means?
An incorrect belief.
","A useless talk.
","A scientific rule.
","A helpful experience.
"]词义猜测题。根据第一段 “The fact that your hair turns grey because of stress is nothing more than an old wives’ tale. It’s true that stress isn’t good for you, but it’s not going to turn you into a silver fox just yet. (头发因为压力而变白的说法只不过是……虽然压力确实对你不好，但它还不会让你马上变成白发苍苍的人。)” 可知，作者认为 “压力导致头发变白” 的说法不正确，由此可推测，画线短语 “an old wives’ tale” 意为 “错误的观念” 符合语境。故选A。
What do we know about red hair?
It doesn’t turn grey as people get older.
","It contains more pheomelanins than eumelanins.
","The amount of pigments in it doesn’t change over time.
","People with red hair have weaker ability to produce pigments.
"]细节理解题。根据第四段 “There are two different types of melanins: eumelanins and pheomelanins. The former produces black and brown pigments, while the latter produces red and yellow pigments. (黑色素有两种不同类型：真黑色素和类黑色素。前者产生黑色和棕色色素，后者产生红色和黄色色素。)” 以及 “The exact amount of these pigments determines whether a person has black, brown, blonde or red hair. (这些色素的确切含量决定了一个人是黑发、棕发、金发还是红发。)” 可知，红发的颜色由类黑色素 (产生红色色素) 决定，说明红发中类黑色素的含量多于真黑色素。故选B。
What do the French scientists aim to do?
To repair damaged hair follicles.
","To protect hair cells against damage.
","To shorten the hair cycle to protect the hair.
","To study the relationship between health and hair color.
"]细节理解题。根据尾段中的 “A team of scientists in France is working to try and stop the melanocytes from being damaged at the end of each hair cycle. They are trying to use a special enzyme to protect the cells from damage. (法国的一组科学家正在努力阻止黑色素细胞在每个头发生长周期结束时受到损伤。他们试图使用一种特殊的酶来保护细胞免受损伤。)” 可知，法国科学家的目标是保护头发细胞 (黑色素细胞) 免受损伤。故选B。
What can we infer from the article?
Grey hair has nothing to do with stress.
","Grey hair is a symbol of declining health.
","It takes three months for new hair to grow.
","The growth and color change of hair depend on cells.
"]推理判断题。根据第一段中的 “In fact, the answer comes from the cells in your hair. These are what determine the color and eventually, the fade to grey. (事实上，答案来自你头发中的细胞。正是这些细胞决定了头发的颜色，并最终决定了头发是否会变白。)” 及第五段中的 “As we age, the ability of the melanocytes to produce more pigments weakens. (随着我们年龄的增长，黑色素细胞产生更多色素的能力会减弱。)” 可知，头发生长和颜色变化依赖于头发中的细胞 (如黑色素细胞)。故选D。
高中 | 细节题题目答案及解析（完整版）
