Passage 3
For hundreds of years, diseases caused by lack in nutrition (營養(yǎng)) were known to men. Some common nutritional diseases are beriberi (腳氣), and scurvy (壞血病). In the 18th century, James Lind, a Scottish doctor, discovered a cure beriberi - whole rice.
A British scientist in 1906 showed that certain foods contain substances important to the growth and development of the body. In time these substances were called vitamins, meaning essential to life. Today there are 13 known vitamins. The human body produces only three of them.
Vitamins regulate (調(diào)節(jié)) the way the body changes food into energy and living tissues (組織). Each vitamins has a definite use and the lack of one vitamin can interfere with the function of another. The continued lack of one vitamin can cause a vitamin lack disease.
The best way for a healthy person to get vitamins is to eat a balanced diet. Eggs, milk, meat, vegetables, fruits, and whole - grain are the most common sources of the necessary variety of foods.
Vitamins help to speed up certain chemical reactions in the body. These reactions are essential for health. Without vitamins, these reactions would occur very slowly or not at all.
Truly vitamins have been correctly named - essential to good health and life.
11. Men have know about nutritional diseases __________.
○A. a long time
○B(yǎng). in 18th century
○C. recently
○D. in 1906
12. Beriberi is a type of _________.
○A. food
○B(yǎng). vitamin
○C. fruit
○D. disease
13. It takes scientists _______ to know how many vitamins there are.
○A. a long time
○B(yǎng). a few years
○C. a short time
○D. a number of experiments
14. Human body produces __________ kinds of vitamins.
○A. all kinds of
○B(yǎng). five
○C. thirteen
○D. three
15. Eating _______ is the best way to get vitamins.
○A. few things
○B(yǎng). vegetables
○C. fruits
○D. many kinds of food
For hundreds of years, diseases caused by lack in nutrition (營養(yǎng)) were known to men. Some common nutritional diseases are beriberi (腳氣), and scurvy (壞血病). In the 18th century, James Lind, a Scottish doctor, discovered a cure beriberi - whole rice.
A British scientist in 1906 showed that certain foods contain substances important to the growth and development of the body. In time these substances were called vitamins, meaning essential to life. Today there are 13 known vitamins. The human body produces only three of them.
Vitamins regulate (調(diào)節(jié)) the way the body changes food into energy and living tissues (組織). Each vitamins has a definite use and the lack of one vitamin can interfere with the function of another. The continued lack of one vitamin can cause a vitamin lack disease.
The best way for a healthy person to get vitamins is to eat a balanced diet. Eggs, milk, meat, vegetables, fruits, and whole - grain are the most common sources of the necessary variety of foods.
Vitamins help to speed up certain chemical reactions in the body. These reactions are essential for health. Without vitamins, these reactions would occur very slowly or not at all.
Truly vitamins have been correctly named - essential to good health and life.
11. Men have know about nutritional diseases __________.
○A. a long time
○B(yǎng). in 18th century
○C. recently
○D. in 1906
12. Beriberi is a type of _________.
○A. food
○B(yǎng). vitamin
○C. fruit
○D. disease
13. It takes scientists _______ to know how many vitamins there are.
○A. a long time
○B(yǎng). a few years
○C. a short time
○D. a number of experiments
14. Human body produces __________ kinds of vitamins.
○A. all kinds of
○B(yǎng). five
○C. thirteen
○D. three
15. Eating _______ is the best way to get vitamins.
○A. few things
○B(yǎng). vegetables
○C. fruits
○D. many kinds of food