↑ 收起筛选 ↑
试题详情

Anyone caring about their health will be able to speak out a few of the major vitamins, and possibly take an educated guess at what they do. Vitamin C, found in oranges and other fruit and vegetables, is important for wound repair. And the much-talked-about “sunshine” vitamin D, produced by the skin in response to UV light, is essential for strong bones.

But what about vitamin P? It might well have you scratching your head. And that's not surprising: the term was first coined in the 1930s to describe a small group of compounds that provide pigment (天然色素) to plants, and were believed to have health benefits. A century later, these compounds are now better known as flavonoids (类黄酮).

Today, scientists have identified between 4,000 and 6,000 different kinds and we now know they are responsible for many of the flavors and smells of fruit and vegetables and also that they protect them from invaders such as pests and bacteria.

They are equally important nutrients for the body, helping maintain bones and teeth, and for the production of the protein collagen (胶原), which provides structure to blood vessels, muscles and skin.

They are also said to help the body deal with some of the key drivers of illness, including oxidation (氧化), a natural process by which the body's cells age and can become damaged and defective. That means they could help to protect against chronic diseases including cancer and heart disease.

1.What do we know about vitamin P?

A.We would scratch our head if we took it.

B.It refers to the compounds also called flavonoids.

C.It was made into a coin in the 1930s.

D.People didn't think it beneficial in the past.

2.Which is NOT the function of vitamin P for humans according to the passage?

A.Helping maintain bones and teeth.

B.Assisting in producing protein collagen.

C.Accelerating the circulation of the blood.

D.Aiding the body to handle the main factors of illness.

3.Which of the following best explains “defective” underlined in the last paragraph?

A.Harmful. B.Discouraged.

C.Vague. D.Deficient.

4.How does vitamin P help slow the aging process?

A.By fighting against oxidation. B.By maintaining bones.

C.By strengthening muscles. D.By protecting against chronic diseases.

高三英语阅读理解中等难度题

少年,再来一题如何?
试题答案
试题解析
相关试题