During the teenage years, hormonal (荷尔蒙的) changes lead to physical changes like rapid muscle growth, burst in height, and weight gain in both boys and girls. Take a look at the information and height and weight charts for teens presented in this article if the question “How much should I weigh for my age and height” is bothering you.
Average Height and Weight Charts for Teens
Faster growth in kids usually can be noticed at age 8. Genetic factors also determine the physical growth of a child. So, it is perfectly normal for two kids of the same age to have different weights and heights. The following figures should be used as guidelines only.
For Boys | For Girls | |||
Age | Height | Weight | Height | Weight |
in Years | in Inches | in Pounds | in Inches | in Pounds |
12-13 | 58-62 | 85-100 | 60-63 | 95-105 |
14-15 | 63-66 | 105-125 | 63-64 | 105-115 |
16-17 | 67-70 | 130-150 | 64 | 115-120 |
18-20 | 68-70 | 150-160 | 64 | 125-130 |
Ideal Body Fat Percentage
Fit men have 14% - 17% body fat.
Fit women have 21% -24% body fat.
Male athletes have 6% -13% body fat.
Female athletes have 14% - 20% body fat.
The ideal body fat percentage varies mainly according to age, sex and the physical activity of the individual. But it is a fact that some female athletes have body fat as low as 10 % and some male athletes had lower than 4% body fat. So, it can be observed that other than the above mentioned factors, genetic factors also influence the body-fat ratio.
Body Mass Index (BMI)
You may use the following formula to calculate your BMI:
As per SI Units (国际单位) : BMI = mass (kg)/[height (meters) ]2
Imperial (英制的) Units 1: BMI = mass (Ib. ) x703/[ height (in. ) ]2
Imperial Units 2: BMI = mass (Ib. ) x 4. 88/[ height (ft) ]2
Following conclusions can be derived from (得到) calculating the BMI:
BMI Calculated | Conclusion |
BMI 18.5~25 | Normal or ideal weight |
BMI > 25 | Overweight |
BMI < 18. 5 | Underweight |
BMI < 17. 5 | Extremely underweight |
BMI = 30 or BMI > 30 | Obese(病态肥胖的) |
BMI = 40 or BMI > 40 | Extremely obese |
1.According to the Average Height and Weight Charts for Teens, ____.
A. girls keep on growing taller during the teenage years
B. girls grow faster at the end of teenager years than boys
C. girls grow faster at the beginning of teenager years than boys
D. boys' average weight is always heavier than girls' during the teenage years
2. Which of the following statements about ideal body fat percentage is RIGHT?
A. Fit men have higher body fat percentage than fit women.
B. Male athletes have higher body fat percentage than fit men.
C. Female athletes have lower body fat percentage than male athletes.
D. Male athletes have much lower body fat percentage than female athletes.
3.After calculating the BMI, you can reach the conclusion whether ____.
A. your weight is normal
B. your hormone level is normal
C. your height is right for your age
D. your body fat percentage is ideal
4.If a boy is 1. 5 meters in height and weighs 68 kilograms, then he is ____.
A. normal B. obese
C. extremely obese D. underweight
1.C
2.D
3.A
4.B
【解析】
试题分析：在青少年时期，荷尔蒙的改变会导致身体的变化，在身高和体重上都会改变，男孩和女孩的变化是不一样的。身高和体重的变化是否正常，本文给出了具体的计算方法。
1.1】C细节理解题。从图表For Boys 12-13岁，身高58-62inches；For Girls12-13岁，身高60-63 inches，可知在青少年初期女孩比男孩长得快。故选C。
2.2】D细节理解题。根据Ideal Body Fat Percentage部分所提到的，Male athletes have 6% -13% body fat.Female athletes have 14% - 20% body fat.从这里可看出男运动员比女运动员有更低的脂肪。故选D。
3.3】A推理判断题。根据Body Mass Index (BMI)这一部分，BMI Calculated 计算结果是BMI 18.5~25，得出结论“正常或理想的体重”；计算结果是 BMI > 25，得出结论Overweight“超重”，所以可知通过计算the BMI可得出你的体重是否正常的结论。故选A。
4.4】B推理判断题。根据Body Mass Index (BMI)中的计算方法，这个1.5米高，重68千克的男孩的BMI是体重除以身高的平方约等于30.7，根据图表中的BMI = 30 or BMI > 30，说明是Obese(病态肥胖的)，故选B。
考点：这是一篇健康类的说明文。
备战中考寒假系列答案科目：高中英语 来源：2014-2015学年浙江杭州地区七校高三上期末英语试卷（解析版） 题型：阅读理解
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But the real reason I'm here is that I want to see people crash. I want businessmen to knock into each other, their umbrellas flying off their arms, and uniformed schoolchildren hitting grannies. Why may I see this now, but wouldn't have had the chance even a year ago? It’s very simple - smartphones.
Smartphone use is booming in Japan. In 2012, only about a quarter of Japanese used them, most being perfectly happy with their everyday mobiles. But now more than half of all Japanese now own a smartphone and the number is rising fast. But with that rise has grown another phenomenon - the smartphone walk. Those people who're staring at a phone screen adopt this kind of pace- their head down, arms outreached, looking like zombies（僵尸）trying to find human prey(猎食).
Surprisingly, an American named Michael Cucek who has lived here for more than 20 years told me smartphone walk probably wouldn’t be a long-term problem. Japanese phone manner is in fact better than anywhere else in the world - hardly anyone speaks on their phones on trains, and teenagers wouldn't dare broadcast music out of one. If things got truly bad at Shibuya, the police would just start shouting at people to look up.
But really, is the smartphone walk such an annoying problem? There's only one way to find out. So I leave the coffee shop, head down to the crossing and start typing an email, promising myself I won't look up until I get to the other side. When they start walking past me, it's my time to cross. As I step forward, the experience quickly becomes nervous - legs jump in and out of my vision without warning, while shopping bags fly towards my face before being pulled away at the last moment. I'm sure I'm going to get hit, but after a few seconds I relax. It’s OK. Everyone's reacting for me.
I expect to see two smartphone walkers just like me. But instead I find a young couple, very much in love and very much refusing to let each other’s hands go just to give way to a fool on his smartphone. The girl gives me such a look of dislike that I quickly apologize and rush round them. That look was enough to ensure I'll never be smartphone walking again.
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A. people at Shibuya crossing always bump into each other.
B. more than a thousand of people gather at Shibuya crossing every day.
C. more than a thousand of people are ready to rush in a competition every day.
D. more than a thousand of people at Shibuya crossing make it a busy one in Japan.
2.Why does the author stand in a coffee shop above Shibuya crossing?
A. Because he is waiting for somebody.
B. Because he can have a good view from there.
C. Because he wants to see what would happen because of smartphones.
D. Because it’s interesting to see businessmen’s umbrellas flying off their arms
3.How does Michael Cucek find smartphone walk in Japan?
A. He found it by accident when he lives here.
B. Japanese pay much attention to their phone manner in public.
C. The police in Shibuya are too strict with people’s phone manner.
D. Smartphone walk in Japan has a deep root.
4. How does the author confirm whether smartphone walk is annoying or not?
A. By personal experimenting
B. By comparing with other way of walk
C. By giving example.
D. By explaining the traffic rules patiently
5.After smartphone walking himself, the author thinks___________.
A. it’s exciting to walk while sending emails
B. it’s really dangerous to walk while sending emails
C. there are some others smartphone walking like him
D. other passers-by give way to him although they dislike.
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