3.Health experts have long known that vitamin D is important for healthy bones and teeth.It may also help to protect the body against diseases such as diabetes and cancer.And now,researchers say vitamin D might help fight brain diseases called dementia (癡呆).
Dementia is a brain disease that damages thinking and memory processes,which scientists call"cognitive (認(rèn)知) abilities."Dementia is difficult to treat.Taking care of someone who has dementia is extremely demanding.And the disease is very frightening to sufferers.Chris Roberts suffers from dementia.He says the worst part of living with this disease was getting lost while driving."The worst thing that I found was getting lost in the car,not just forgetting where I was going-I wouldn't know where I was."More than 47million people around the world suffer from dementia.The World Health Organization reports that 60percent of them live in low-and middle-income countries.
We get vitamin D from some foods like nuts,lentils (扁豆) and fatty fish.We also get vitamin D from the sun.But that is not dependable.In some parts of the world,there is not enough sunlight to provide enough vitamin D.Also,sunblock prevents the vitamin from entering the body.To add to the problem,the skin's ability to process vitamin D weakens as a person ages.
Researchers at Rutgers University in New Jersey are exploring the relationship between vitamin D and dementia.The team recently measured vitamin D levels and cognitive ability in older people.Nutritional sciences professor Joshua Miller led the team.He said cognitive abilities differed among the study subjects.He said tests showed that about 60percent of the group was low in vitamin D.
32.Which of the following is true about vitamin D?B
A.Vitamin D can decrease people's risk of heart diseases.
B.Vitamin D helps the body fight against cancer.
C.Vitamin D is mainly obtained from the sun.
D.The need for Vitamin D decreases as people age.
33.What does the underlined word"demanding"mean in Paragraph 2?D
A.Boring but rewarding.
B.Disturbing and frightening.
C.Disgusting and stressful.
D.Hard and tiresome.
34.What does Paragraph 3mainly talk about?B
A.How vitamin D affects people's health.
B.Where people get vitamin D.
C.Whether sunlight can produce vitamin D.
D.Why people's age influences the production of vitamin D.
35.Where can we most probably read the passage?C
A.In a travel brochure.
B.In a literature magazine.
C.In a science journal.
D.In a commercial advertisement.
分析 本文講述的是維生素D的用處以及可以獲得途徑.
解答 32.B細(xì)節(jié)理解題.根據(jù)第一段It may also help to protect the body against diseases such as diabetes and cancer.可知,維生素D可能會幫助人對抗疾。蔬xB.
33.D詞義猜測題.句意:照顧一個患有癡呆癥的人是非常苛刻困難的.故選D.
34.B段落大意題.根據(jù)第三段的描述,可知我們可以從哪些地方獲得維生素D.故選B.
35.C文章出處題.本文講述的是維生素D的用處以及可以獲得的途徑.所以文章的出處最可能是科學(xué)雜志,故選C.
點(diǎn)評 本文是健康環(huán)保類閱讀理解.做這類題材閱讀理解時要求考生對文章通讀一遍,做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析,結(jié)合選項(xiàng)選出正確答案.推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).