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题型:阅读理解-阅读单选 难度:0.64 引用次数:131 题号:2897025
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. ________________________________________________________________________________________.
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 fat. So, it can be observed that other than the above mentioned factors, genetic factors also influence the body-fat rct that some female athletes have body fat as low as 10 % and some male athletes had lower than 4% body faatio.
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.normalB.obese
C.extremely obeseD.Underweight
【知识点】 购物 商品 竞技/比赛

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