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(有缺陷的). That means they could help to protect against chronic diseases including cancer and heart disease.

8.Which of the following best explains "rattle off" underlined in Paragraph 1?

A.Quickly say. B.Quickly pass. C.Quickly find. D.Quickly take.

9.What do we know about Vitamin P?

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

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

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

D.It refers to the compounds also called flavonoids.

10.How many functions of Vitamin P for humans are mentioned?

A.Four. B.Three. C.Two. D.One.

11.How does Vitamin P help slow the aging process?

A.By dealing with oxidation. B.By maintaining bones.

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

【答案及解析】：

答案：8.A; 9.D; 10.B; 11.A

解析：8.rattle sth off 的意思是一口气说出。从第一段后面出现的guess和much-talked-about 等词可以做出正确判断。

9.第二段It might well have you scratching your head. 是指它很有可能会让你挠头(冥思苦想),故A选项错。the term was first coined in the 1930s是指这个术语是20世纪30年代被创造的,故B选项错。从were believed to have health benefits可知C选项错。从 these compounds are now better known as flavonoids可知D选项正确。

10.第一种为: for the body, helping maintain bones and teeth;第二种为:for the production of the protein collagen(胶原),which provides structure to blood vessels, muscles and skin;第三种为:They are also said to help the body deal with some of the key drivers of illness.That means