I’m a skeptic（懷疑論者）when it comes to the benefits of taking vitamins and other supplements. We swallow far more than any other country---yet we’re not the healthiest folks by far, nor do we live the longest.

There’s more bad news for vitamins this week: Turns out that taking folic acid （葉酸）and vitamin B12 supplements doesn’t prevent heart attacks or death, according to a major new study in the Journal of the American Medical Association. It was hoped they would, since the vitamins do reduce levels of homocysteine, an amino acid（氨基酸）that is higher in the blood of people who have a higher risk of heart disease. In fact, homocysteine was reduced 30 percent after one year of treatment in the participants who took both vitamins. But in the following three years, just as many vitamin takers died as those who didn’t take the vitamins. Even worse, the study was stopped early because another similar study suggested that there may be an increased risk of cancer from taking B vitamins.

I had been taking a health ---food store monster multivitamin（綜合維生素劑）for months. Coincidentally, I had been experiencing some strange numbness in my legs that was starting to scare me. I remember sitting in a long meeting with ankles crossed, and when I tried to stand up I crumpled on the floor and lit my chin on the glass coffee table because my leg had gone completely numb and worthless. As I sat there and shook my leg, I got that “pins and needles” feeling and soon was OK. But it scared me enough to make an appointment with a neurologist who suggested an MRI to rule out multiple sclerosis, stroke, or a brain tumor.

While I’ll never know for sure if the vitamins caused my problem, many, many studies have reminded us that pill forms of vitamins and minerals don’t provide the same benefit as getting them form food. There’s a lot we don’t know about how the human body works. Until we know more, I’m getting of my vitamins from the famer’s market.

1．Why do people take folic acid and vitamin B12 supplements?

       A．They want to stop heart attacks or live longer.

       B．They want to liver longer.

       C．They want to increase risk of cancer.

       D．They want to experience some strange numbness.

2．Which of the following is NOT true according to the passage?

    A．It was the multivitamin he took that caused the writher to get the “Pins and needles” feeling.

       B．Taking more vitamins will not make a man healthier or live longer.

       C．The vitamins can reduce levels of homocysteine in our body.

       D．The less homocysteine in our blood, the less chance we’ll have heart attacks.

3．What can we know from the last paragraph?

       A．The writer is getting most of pill forms of vitamins form the markets.

       B．The writer continues to take vitamins in great quantities.

       C．The writer is getting vitamins from food, which can provide more benefits.

       D．The writer will never take pill forms of vitamins and minerals.

4．The best title of the passage can be          .

       A．Vitamins: Benefit Us Lot                       B．Vitamins: No Help for Your Heart

       C．Vitamins: Bad for the Brain, Too            D．Some Bad News about Vitamins

練習冊系列答案
相關(guān)習題

科目：高中英語 來源：2015屆黑龍江省綏化市高一下期第一次月考英語試卷（解析版） 題型：單項填空

Would you like some chocolate?

--I’d like some, but I’m _____

A．on diet           B．in a diet           C．on a diet          D．in diet

 

查看答案和解析>>

科目：高中英語 來源：2013屆新疆烏魯木齊一中高三上學期第一次月考英語試卷（解析版） 題型：書面表達

假設(shè)你是某市一中的學生李明，現(xiàn)在你向市長寫一封信，反映學校周邊的交通安全問題。要點如下：

1.學�？拷鼛讞l主要街道，很多學生和老師得橫過街道才能進入學校大門；

2.在交通高峰時期，車輛很多，學生過街上學不得不在車流中穿行；

3.有的家長為確保學生上學安全，每天開車送孩子,這使交通更加擁擠不堪；

4.建議政府采取措施（可適當發(fā)揮），以免發(fā)生事故。

①詞數(shù)：100個左右

②參考詞匯：交通高峰時期rush hour，穿行thread one’s way.

③開頭已寫好，不計入詞數(shù)

Dear Mayor,

I’m a student of No.1 Middle School. Here I have something to tell you.

Yours,

Li Ming

 

查看答案和解析>>

科目：高中英語 來源：甘肅省2010屆高三下學期第三次模擬考試試卷（英語） 題型：閱讀理解

 

  Matches made over the Internet often do not last long because people end up choosing unsuitable

partners and forming emotional bonds before meeting face-to-face, an Australian university researcher

has found.

  Women may especially find Mr. Wrong, as they tend to be attracted by fine comments or clever

emails, said psychologist Matthew Bambling from the Queensland University of Technology.

  “You can never assume things are the way they seem online,” Bambling said. “The fact that they

can write a clever comment or a witty email doesn’t mean they will be Mr. Right, that’s for sure,” he

said, adding some men use the concept of “netting”, sending emails to dozens of women and hoping

one might respond. Bambling said you can find a partner online, but warned those using the Web to

find love to be aware of the traps. “There’s definitely an uncontrolled effect online,” he said, with

people more likely to exaggerate their good points while hiding anything negative. “Few guys for

example would say ‘look, I’m a middle aged alcoholic who’s been married five times, pick me’.

They’re going to present themselves as a good catch.” He said it was easy for people to quickly invest

too much emotionally in an online relationship because they don’t see the full picture of the person

they are emailing.

  Bambling said people can avoid many of the problems by meeting early in the actual relationship,

rather than by getting to know each other only by email. He suggests couples arrange to meet over

coffee after a few emails, which will help people from building up a fantasy image of their match.

“The main thing to remember is to make real life contact as soon as possible if you are interested in

someone, because then you will know contact as soon as possible if you are interested in someone,

because then you will know if a relationship is a possibility.” He said.

1. Why were women quite likely to find Mr. Wrong over the Internet?

   A. Because they often judge a person by his appearance.

   B. Because single women usually felt more lonely.

   C. Because the emotional bonds were hard to break.

   D. Because they were easily attracted by fine comments.

2. About the online relationship Bambling suggests we should be ______.

   A. rejective    B. favorable      C. cautious      D. hopeful

3. The underlined word “exaggerate” in Paragraph 3 probably means “______”.

   A. enlarge     B. invent         C. remove       D. cover

4. What is suggested by Bambling for a better online relationship?

   A. Writing clever comments or emails to girls frequently.

   B. Finding a partner online through one night respond.

   C. Making real life contact before further development.

   D. Investing much emotion in your partner.

 

查看答案和解析>>

科目：高中英語 來源：浙江省杭州市20092010學年高二下學期第一次質(zhì)量檢測試題（英語） 題型：書面表達

六、書面表達（滿分15分）

假如你是李華，今年上高三在即，看到大家每天為自己所做的一切，深有感受。請根據(jù)下表提示，寫一篇110詞左右的短文、可以適當增加細節(jié)、適當發(fā)揮。

家長

生活上的照顧

學校

提供方便（安排講座……）

老師

學習上的幫助（鼓勵，答疑解難……）

你自己

（自由發(fā)揮，至少兩點）

 

開頭已經(jīng)給你：

I’m a senior 3 student. The college entrance exam is on the way. ___________________________

_______________________________________________________________________________

_______________________________________________________________________________

 

查看答案和解析>>

科目：高中英語 來源：2010-2011學年廣東省汕頭市高三上學期期末質(zhì)檢英語卷 題型：信息匹配

下面是美國著名游記作家Bill Bryson的幾本作品，首先請閱讀它們的封面信息：

A.

A Walk in the Woods: Rediscovering America on the Appalachian Trail

B.

The Lost Continent: Travels in Small-Town America

C.

I’m a Stranger Here Myself: Notes on Returning to America after 20 Years Away

D.

The Road Less Traveled: 1000 Amazing Places off the Tourist Trail

E.

Neither Here nor There: Travels in Europe

F.

The English Landscape: Its Character and Diversity

下面是對這幾本書的簡要介紹，請把它們對應的封面信息找出來：

1. In this collection, Bill Bryson is writing from home. We find he assesses life both in New England and in the contemporary United States. With the telescopic perspective(遠望視角) of one who has stepped out of the American mainstream and come back after 20 years, Bryson holds the mirror up to U.S. culture and feel strange to his motherland.

2.This book is a guide to the world’s unspoilt sights and experiences. It presents one thousand fresh and fascinating alternatives to hundreds of well-known tourist destinations and sights, including alternatives to the Carnival in Rio and the beaches of Thailand, the most-visited national parks, over-rated restaurants and holiday sites.

3.Returning to the U.S. after 20 years in England, Bill Bryson decided to reconnect with his mother country by hiking the length of the 2100-mile Appalachian Trail. Awed by merely the camping section of his local sporting goods store, he still goes into the wilderness and learns hard lessons about self-reliance.

4. A travelogue by Bill Bryson is as close to a sure thing as funny books get. This book is no exception. Following an urge to rediscover his youth, the author leaves his native Des Moines, Iowa, in a journey that takes him to across 38 states in the country, which is like a small town in his opinion.

5.Born in Iowa, Bryson backpacked through Europe as a young man. While living in England some 20 years later, he revisited many of the same places from arctic Norway’s northern lights to romantic Capri in Italy. Here he jumps back and forth between old memories and new experiences.

 

查看答案和解析>>

同步練習冊答案