Not so many years ago, the word vitamin was known only to a few scientists. Today it is very widely used, and the importance of vitamins in our foods is common knowledge.
Vitamins are life-giving substances found in foods and are needed for the proper growth and general health of the body. The different kinds of vitamins are indicated by letters of the alphabet. At the present time, vitamins A, B1, B2, C, D and E are known. A proper diet should contain a collection of foods in which all of these vitamins are present. Vitamins are also prepared and sold in tablet and capsule form.
Each vitamin has its particular work to do in the life-giving process. Vitamin B1, for example, benefits appetite and digestion. It also helps the body grow. Another vitamin helps the blood to clot, so that danger of bleeding to death in case of injury is lessened. Still another makes the eyes stronger of seeing at night. Airplane pilots need plenty of this vitamin. Scientists think vitamins may have some effects on keeping the hair from turning gray.
What is the main idea of the passage?
Not so many years ago, the word vitamin was known only to a few scientists. Today it is very widely used, and the importance of vitamins in our foods is common knowledge.
Vitamins are life-giving substances found in foods and are needed for the proper growth and general health of the body. The different kinds of vitamins are indicated by letters of the alphabet. At the present time, vitamins A, B1, B2, C, D and E are known. A proper diet should contain a collection of foods in which all of these vitamins are present. Vitamins are also prepared and sold in tablet and capsule form.
Each vitamin has its particular work to do in the life-giving process. Vitamin B1, for example, benefits appetite and digestion. It also helps the body grow. Another vitamin helps the blood to clot, so that danger of bleeding to death in case of injury is lessened. Still another makes the eyes stronger of seeing at night. Airplane pilots need plenty of this vitamin. Scientists think vitamins may have some effects on keeping the hair from turning gray.
What is the main idea of the passage?
A. prevention of diseases
B. how scientists discovered vitamins
D. what vitamins are and what they do
Quảng cáo
Trả lời:

D. what vitamins are and what they do
Câu hỏi cùng đoạn
Câu 2:
We know the name of vitamins through ___________.
We know the name of vitamins through ___________.
A. the letters of the alphabet
B. the pictures

A. the letters of the alphabet
Câu 3:
The word "process" in paragraph 3 is CLOSEST in meaning to ___________.
The word "process" in paragraph 3 is CLOSEST in meaning to ___________.
A. technique
B. procedure

B. procedure
Câu 4:
The word "another" in paragraph 3 refers to ___________.
The word "another" in paragraph 3 refers to ___________.
A vitamin
B. diet

A vitamin
Câu 5:
Which of the following is NOT TRUE according to the passage?
Which of the following is NOT TRUE according to the passage?
A. Vitamins have an important effect on health.
B. Each vitamin has its particular work to do.
C. Vitamins can be prepared in tablet and capsule form.

C. Vitamins can be prepared in tablet and capsule form.
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