Which classfication is an eleven-year-old male student 40kg in weight,140cm in height put into? a.Obese b.Underweight c.Normal d.Overweight Biết đáp án là Overweight nhưng không biết giải thích,giúp v...

The classification of an eleven-year-old male student who weighs 40kg and is 140cm in height is "Overweight" because his Body Mass Index (BMI) is above the normal range for his age and height. BMI is calculated by dividing weight in kilograms by the square of height in meters. In this case, the BMI is 20.4, which is above the normal range for his age and height. For question 18, the correct option is D. "Non driver cars running in the street are scientific products that have been developed and are being experimented in some parts of the world." For question 19, the Vietnamese proverb that is synonymous with the English saying "Your dream doesn't have an expiration date. Take a deep breath and try again" is "Có công mài sắt có ngày nên kim" which means "If you work hard enough, you will eventually succeed." For question 20, the first day of February in that year is a Thursday. This can be determined by counting the number of days between the last Wednesday in January and the first day of February, which is 2 days. Since there are 7 days in a week, the first day of February will be 2 days after Wednesday, which is Thursday.