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[originaltext] About fifty different vitamins have been identified, and a de
[originaltext] About fifty different vitamins have been identified, and a de
游客
2023-07-06
15
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问题
About fifty different vitamins have been identified, and a deficiency in many of these can lead to illness. Vitamin A is most important for good eyesight. Liver contains a considerable amount of vitamin A, but vitamin A is also found in fish, meat, milk, and some fruits and vegetables.
Vitamin B in fact consists of twelve different chemicals, which are found in egg, cheese and vegetables. If a person has an inadequate amount of vitamin B in his or her diet, this may particularly affect the skin, the nervous system and the heart.
Vitamin C helps to heal injuries. Some doctors believe that large quantities of vitamin C helps people avoid colds. Fruits and uncooked vegetables are rich in vitamin C, but when they are overcooked, or left for a long time, they lose most of their vitamins.
Vitamin D is essential for the growth of bones and is found in fish, liver and milk. Vitamin D is the only vitamin which the body can make for itself, but it can only do this if there is sufficient sunlight. A lack of both sunlight and vitamin D can result in disease called rickets, which causes bones to soften.
A well-balanced diet will provide an adequate amount of vitamins.
Questions 19 to 21 are based on the passage you have just heard.
19. Which of the following statements is true?
20. Which vitamin can be made by the human body?
21. Which of the following statement is implied by the speaker?
选项
A、People should eat more to get sufficient amount of vitamins.
B、People should have more sunlight to ensure absorbing various vitamins.
C、People should not overcook the vegetables.
D、People should do more exercises.
答案
C
解析
事实细节题。由短文最后一句A well—balanced diet will provide an adequate amount of vitamins.可知均衡的饮食可以提供充足的维生素,故A错误。选项B不符合短文描述,因为充足的阳光只能保证不会缺乏维生素D。选项D短文没有提及。选项C正确,短文中提到but when they are overcooked, or left for a long time,they lose most of their vitamins.即蔬菜不能烹饪过度,否则会造成维C的流失。所以选C。
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