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In spring, some people wear light T-shirts while others are in heavy down coats (羽绒服). It seems that people feel different temperatures on the same day. Why does this happen?

In fact, people don’t feel air temperatures directly. It is through the sensors (传感器) on our skin that we can feel cold, cool, warm, and hot temperatures. They help us decide whether to wear more or fewer clothes.

When our bodies are the same size, how much body fat we have may be different and it will influence how we feel temperatures. The more body fat one has, the warmer he or she feels. This is because the fat under the skin helps keep heat. For example, old people often feel colder than young people as the fat layers (层) under the skin get thinner with age.

Surprisingly, another reason is height. We need blood to move around our bodies to keep us warm. Since most people’s hearts are about the same size, it takes more time and energy for the blood to move around in taller people. So taller people might feel colder.

Metabolism (新陈代谢) also influences how we feel temperatures. It shows how fast our bodies use energy. People with a higher metabolism always feel hotter than others. This is because they produce more heat and may take more time to cool down. For example, people with more muscles (肌肉) often feel warmer.

1.1. How do we feel air temperatures? _________________________________________________________________

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解析：选We feel air temperatures through the sensors on our skin.。答案：We feel air temperatures through the sensors on our skin. 题型：细节理解题 解析：定位第二段 “It is through the sensors (传感器) on our skin that we can feel cold, cool, warm, and hot temperatures.” 直接提取信息作答。

2.2. What helps people keep heat? _________________________________________________________________

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解析：选The fat under the skin.。2.答案：The fat under the skin. 题型：细节理解题 解析：定位第三段 “This is because the fat under the skin helps keep heat.” 皮下脂肪帮助保温。

3.3. According to Paragraph 4, who might feel colder? _________________________________________________________________

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解析：选Taller people.。3.答案：Taller people. 题型：细节理解题 解析：定位第四段 “So taller people might feel colder.” 个子更高的人可能感觉更冷。

4.4. Do people with a lower metabolism feel hotter than others? Why or Why not? _________________________________________________________________

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解析：选No, they don’t. Because people with a higher metabolism produce more heat and feel hotter.。4.答案：No, they don’t. Because people with a higher metabolism produce more heat and feel hotter. 题型：细节理解问答题 解析：定位第五段 “People with a higher metabolism always feel hotter than others.” 新陈代谢高的人才更容易热，代谢低的人不会。

5.5. According to the passage, how many factors (因素) influence people’s feelings about temperatures? What are they? _________________________________________________________________

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解析：选Three. They are body fat, height and metabolism.。5.答案：Three. They are body fat, height and metabolism. 题型：综合概括题 解析：文章依次讲了三个因素：体内脂肪、身高、新陈代谢。