精英家教網 > 初中英語 > 題目詳情

Vitamin(維生素)D is called “sunshine vitamin,”and it is very important to health,yet more Americans are not getting enough,U.S.researchers said on Monday.Researchers found that 75 percent of Americans can’t reach the levels of vitamin D,up from about 50 percent of them 20 years ago.Getting enough vitamin D can be easy:spend 10 minutes in the sun with legs and arms exposed (暴露),or take vitamin pills.

    “But people’s habits have changed…they are less active and outdoors less,and also protecting their skin from the sun because of skin cancer risk(皮癌風險),”said Dr.Adit Ginde,who did the study.Traditionally, vitamin D has been seen important to bone(骨)health and to prevent rickets(軟骨。,but recent discoveries show many kinds of cells(細胞)use vitamin D in some way, Ginde said.

    Food can boost(提升)vitamin D levels,but only a few foods.Those include some kinds of fish(salmon,sardines,tuna and mackerel)and milk.But the amounts in milk are not enough to keep people healthy.In the last few years,vitamin D has gained more attention.People are paying a lot more attention to it.A second study in the journal supposed the idea of providing more vitamin D for bone health.Researchers did a research on some people aged 65 or older.They found that spinal bone fractures(脊椎斷裂)decreased(卜降)20 percent when the patients took vitamin D every day.

    Researcher Heike Bischoff-Ferrari wrote in the report.”it is possible for people to increase the amount of vitamin D earlier to keep healthy.”

1.Why Vitamin D is called“sunshine vitamin”?

A.Because it is like sunshine

B.Because people can get vitamin D in the sun.

C.Because it is very important

D.Because there isn’t enough vitamin D in the food.

2.If people have enough vitamin D.they can avoid __________.

A.cold                       B.cancer                   C.rickets                   D.fever

3.We can get vitamin D by __________.

A.eating some food                                        B.spending time in the sunshine

C.taking vitamin D Pills                                  D.all of the above

4.Americans get __________ vitamin D than before.

A.more                   B.less                       C.better                     D.worse

練習冊系列答案
相關習題

科目:初中英語 來源:浙江省杭州市高橋初中教育集團2012屆九年級12月質量檢測英語試題 題型:001

聽力部分(25分)

一、聽短對話,回答問題(共5小題,計5分)

聽下面5段對話,每段對話后有一個小題。從題中所給的A、B、C三個選項中選出最佳選項。聽完每段對話后,你都有10秒鐘的時間來回答有關小題和閱讀下一小題。每段對話僅讀一遍。

1.What are they talking about?

A.Buying a birthday present.

B.Learning English.

C.Having a birthday party.

2.What does the woman mean?

A.The man should stop smoking.

B.The man should stop drinking coffee.

C.Drinking coffee is better than smoking.

3.What is the most useful way for Eric to improve his English?

A.Watching English movies.

B.Reading magazines.

C.Practicing speaking English.

4.What is Teddy’s attitude(態(tài)度)to too much homework?

A.To copy others’.

B.To try his best.

C.To forget it.

5.What did the girl use to do according to the dialogue?

A.Go to bed late.

B.Be afraid of her father.

C.Sleep with the light on.

二、聽較長對話,回答問題(共6小題,計12分)

聽下面兩段長對話。每段對話后有幾個小題,從題中所給的A、B、C三個選項中選出最佳選項。聽每段對話前,你有時間閱讀各個小題,每小題5秒鐘;聽完后,各小題給出5秒鐘的作答時間。每段對話讀兩遍。

聽下面一段對話,回答第6至第8小題,對話讀兩遍,F(xiàn)在,你有15秒鐘的時間閱讀這三個小題。

6.What do they want to do next Spring Festival?

A.Follow the customs.

B.Have a special one.

C.Just stay at home.

7.What kind of places does the man prefer to visit?

A.Cities.

B.Beaches.

C.Swimming pools.

8.Who are the two speakers according to the dialogue?

A couple.

B.Mother and son.

C.Father and daughter.

聽下面一段對話,回答第9至第11小題,對話讀兩遍,F(xiàn)在,你有15秒鐘的時間閱讀這三個小題。

9.What will the weather probably be like tomorrow?

A.Sunny.

B.Cloudy.

C.Rainy.

10.What does the boy plan to do at first?

A.Go on a picnic.

B.Go to the cinema.

C.Play ping-pong.

11.What does the boy finally decide to do?

A.Go to the cinema.

B.Read computer books.

C.Play ping-pong.

三、聽獨白,回答問題(共4小題,計8分)

聽下面一段獨白,并按獨白的要求在試卷上完成任務,你可以邊聽邊完成任務,然后你會看到4個問題和相關的選項。請從每個問題A、B、C三個選項中選出最佳選項。聽獨白前,你有20秒鐘的時間閱讀有關材料和4個小題。聽完獨白后,你有20秒鐘的時間來選擇有關選項。獨白連讀兩遍。

參考詞匯:

amylum:['?m?l?m]淀粉  iodine['a??da?n]碘酒  dissolve[d?'z?lv]溶解

chopstick['t??pst?k]筷子  mixture['m?kst??]混合物 Vitamin[v?t?m?n]維生素

12.What is not used in this experiment(實驗)?

A.Boiling water.

B.Vegetable.

C.Milk.

13.What can be used if you don’t have a glass?

A.A glass

B.A bowl

C.A chopstick(筷子)

14.Which of the following is the last step of the experiment?

A.Put a little amylum(淀粉)into the glass.

B.Drop(滴)some iodine(碘酒)into the mixture(混合物).

C.Drop the juice of the green vegetables into the glass.

15.What color will it be if there is some Vitamin C(維生素C)in the vegetable?

A.Blue

B.Milk white

C.Yellow

查看答案和解析>>

科目:初中英語 來源:廣東省茂名市愉園中學2011-2012學年九年級第二次統(tǒng)測英語試題 題型:050

閱讀理解

閱讀下面文章,根據文章內容,從每小題所給的A、B、C、D四個選項中選出能回答所提問題或完成所給句子的最佳答案。

  It was so dark outside the car window that is was hard to see anything.

  “Can I have a carrot, Mum?” Riley asked.

  “I don't have any carrots,” her mum said.“How about an apple?”

  “No,” said Riley.“It has to be a carrot.”

  “Why do you want a carrot?” asked her mum.

  “You always say carrots help your eyes,” said Riley.“If I eat one now, it might help me see in the dark.”

  Would eating a carrot really help Riley? What is special about carrots? A clue to what makes a carrot special is its color.Carrots are orange because they store beta-carotene(胡蘿卜素).Beta-carotene is a way to talk about Vitamin A(維生素A).Your eyes need Vitamin A.It helps them work.

  When light hits your eye, very small parts inside turn the light into messages.The messages go to your brain(腦),and then you know what you're looking at.Your eye can only turn light into messages when it has a special chemical(化學物質).That's where Vitamin A comes in.Your eyes use Vitamin A to make the special chemical.Every time your eye changes light to messages, a little bit of the chemical is used up.By the end of the day, you've looked at hundreds of things.That uses up a lot of the chemical.Your eyes need to make more.

  What should you eat if you don't like carrots? Don't worry.Other fruits and vegetables have Vitamin A too.The secret is in their color.Most orange or red fruits store some beta-carotene, or Vitamin A.Sweet potatoes, red peppers, mangoes(芒果)are a few that have the same orange secret.Can you think of any more?

(1)

Riley wanted a carrot because she thought ________.

[  ]

A.

she liked it

B.

she was thirsty

C.

it could help her see in the dark

D.

it was sweet and delicious

(2)

The word “clue” here in Chinese means ________.

[  ]

A.

告知

B.

線路

C.

方法

D.

線索

(3)

How can Vitamin A help your eyes work?

[  ]

A.

The special chemical can stop your eyes from using up Vitamin A.

B.

Vitamin A can stop your eyes from using up the special chemical.

C.

The special chemical is used to make Vitamin A the light is turned

into messages with.

D.

Vitamin A is used to make the special chemical the light is turned

into messages with.

(4)

Which one is NOT TRUE according to the above passage?

[  ]

A.

Carrots are orange because they store beta-carotene.

B.

Any food which is orange or red must have some Vitamin A.

C.

Most fruits that are orange or red store some beta-carotene or

Vitamin A.

D.

Sweet potatoes, red peppers, and mangoes have the same orange secret.

(5)

The passage mainly tells us that ________.

[  ]

A.

we can't see clearly in the dark unless we eat any carrots every day

B.

we can't see clearly unless we eat any orange or red food every day

C.

we should eat some food with Vitamin A so that we can see clearly

D.

we should eat some fruit with beta-carotene so that we can see in the dark

查看答案和解析>>

科目:初中英語 來源:2014屆浙江杭州蕭山義蓬學區(qū)九年級第二學期3月月考英語卷(解析版) 題型:閱讀理解

任務型閱讀。維生素對人體很重要,大家了解他們嗎?請仔細閱讀第56-60題中的五種維生素的介紹和AF材料說明,找出需要補充的維生素的每個人。

????????????? 1.Vitamin A

What can high-vitamin A foods do for you?

be great for night vision

help you see in color

help your grow properly and aids in healthy skin

﹡ vitamin A in carrots helps you see at night

????????????? 2.The B vitamins

What can the B vitamin do for you?

help make energy and set it free

help make red blood cells which carry oxygen(氧氣) throughout your body

﹡ The B vitamins in leafy green vegetables help your body make protein(蛋白質)and energy.

????????????? 3.Vitamin C

What can vitamin C do for you?

keep body tissues(組織) in good shape

help you heal when you get hurt

help your body resist infection

﹡ Vitamin C in oranges helps your body heal if you get a cut

????????????? 4.Vitamin D

What can vitamin D do for you?

help keep your bones strong and healthy

help keep your teeth strong and healthy

help your body absorb the amount of calcium()

﹡ Vitamin D in milk helps your bones and teeth.

????????????? 5.Vitamin E

What can vitamin E do for you?

protect your skin from ultraviolet(紫外線) light

protect you lungs from becoming damaged by polluted air

help make red blood cells

﹡ Sunflowers seeds are the richest in Vitamin E

A. Emily often feels tired and seems to be lack of energy.

B. Jeff spent his summer vacation on the beach and got serious sunburnt.

C. Kate has poor eyesight and she can’t see clearly at night.

D. Tony sometimes feels pains in his bones and he has loose teeth.

E. Luke is so careless that he often gets hurt. And it takes a long time for his wound to heal.

F. Linda feels nervous before the new people.

 

查看答案和解析>>

科目:初中英語 來源: 題型:閱讀理解

 My good friends, if you ‘re too busy , maybe it’s time you slowed down and enjoyed a meal with a friend. Try to get away from fast food and choose slow food.

    For years, the pace(節(jié)奏)of life has increased for many people. They are too busy to cook.Luckily, there are business people who take the chance to provide a “fast ” way to deal with the problem. You can go to the supermarket and buy cooked food. All you have to do is to heat it and you can enjoy your meal in 10 minutes.

Still too slow ? OK, just go to a fast-food restaurant , order your meal and within 5 minutes it will be made for you.

    The problem is health. Fast food has much more fat, sugar,salt, oil and calories (卡路里), and far fewer vitamin's(維生素)than homemade food. And so, since people have always wanted to live longer,a small but growing population is choosing not only fresh food, but also organic(有機的)food.

    Another reason for changes in eating habits is social. Over the centuries,mealtime has been used to visit , laugh and learn. However, today most of us are having a very different lifestyle! Some people have realized it and they are looking for ways to return to that. Goodbye, McDonald’s.

    Finally, it makes you feel good to plan your meal, cook your meal and see your meal looking like the picture in your cook book. So if you’re too busy, maybe it’s time you slowed down and enjoyed a homemade meal.

1Why do many people buy cooked food in the supermarket ?

    A. It’s delicious.                  B. They think it’s a fashion to eat it.

    C. It saves them time.              D.it save them money. 

2 The writer thinks we just have to wait _____ minutes at most for our meal in a fast food restaurant.

    A. five .        B.fifteen.          C.eight.       D. fifth 

3 Fast food is low in _________ ?

    A. salt .        B.calories .        C.sugar.       D. vitamins .

4 What does the underlined word “that” in Paragraph 5 mean ?

A. Eating in a fast-food restaurant .

B. Visiting friends.

C. Having a different lifestyle. .

D.Enjoying slow food. 

查看答案和解析>>

同步練習冊答案