If you thought taking vitamins would reduce the risk of lung cancer, think again．
Researchers who studied 77，721 people said on Friday that people who took too much vitamin E，especially smokers，had a small but higher risk(风险) of developing lung cancer．
They tracked the subjects’use of multi-vitamins，vitamin C and vitamin E to see if it offered protection from lung cancer．But they found that none of the vitamins was tied to a reduced risk．
“If you could find some sort of magic pill―a pill you could take once a day to decrease your risk―that would be wonderful．But unfortunately．we didn’t find that in our study,”lead researcher Christopher Slatore，of the University of Washington Seattle，said．
The subjects of the study were followed for four years，and 521 developed lung cancer，the majority of them smokers or former smokers，Slatore’s team reported in the American Journal of Respiratory and Critical Care Medicine．
Among those in the study who developed lung cancer, the researchers saw a small increased risk related with vitamin E supplements(补充剂)in addition to the expected connections to smoking，family history and age．
This added up to a 28 percent increased risk of developing lung cancer for those taking 400 mg of vitamin E supplements daily for 10 years，the researchers said．
“For people―especially smokers―I suggest that they not take vitamin E(as a supplement) unless they have a very strong reason to take it．” Slatore said．
The idea that vitamin supplements are healthful，or at least not harmful．comes from the desire of many people to match the benefits of a healthful diet with a convenient pill，Tim Byers of the University of Colorado School of Medicine．wrote in an essay．
53．The writer thinks the statement“taking vitamins would reduce the risk of lung cancer，is .
A．wrong B．right C．doubtful D．possible
54．According to the study of researchers， may increase the risk of lung cancer.
A．the heavy smokers’sudden stop of smoking
B．use of multi-vitamins instead of a healthy diet
C．taking 400 mg of vitamin C supplements daily for a year
D．vitamin E supplements，smoking，family history and age
55．According to the passage，many people take vitamin supplements to
A．cure lung cancer caused by family history
B．prevent diseases like cancer and heart attack
C．save the trouble of making a healthful diet
D．reduce the pain caused by lung cancer
56．What is the main idea of the passage?
A．Taking vitamins would reduce the risk of lung cancer．
B．Vitamins are no guard against lung cancer．
C．Vitamin supplements are convenient and magic．
D．Vitamins ale harmful，or at least not healthful．
科目：高中英语 来源：皇冠优化名题 高中英语 题型：050
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
查看答案和解析>>
科目：高中英语 来源：河北省邢台一中2011－2012学年高二下学期第四次月考英语试题 题型：053
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为选项．
Ea sy Way s to Keep Your Brain SharpEveryone i s forgetful, but a s we age, we start to feel like our brain s are slowing down a bit-and that can be a very annoying thing． 1 Read on for some technique s worth trying．
1． 2
People who regularly made plan s and looked forward to upcoming event s had a 50 percent reduced chance of Alzheimer' s di sea se(老年性痴呆症)， according to a recent study． 3 Something a s simple a s setting a goal to have a weekly coffee date with a friend will do．There' s evidence that people who have a purpo se in life or who are working on long or short-term goal s appear to do better．In other word s, keep your brain looking forward．
2．Go for a walk．
Mildly rai sed glucose(葡萄糖)level s can harm the area of the brain that help s you form memorie s and phy sical activity can help get blood glucose down to normal level s．In fact, exerci se produce s chemical s that are good for your brain． 4
3．Learn something new．
Take a Spani sh cla s s online, join a drawing club, or learn to play card s．A study found that mental stimulation limit s the weakening effect s of aging on memory and the mind．But the be st thing for your brain i s when you learn something new and are phy sically active at the same time． 5 Or you can ju st go dancing with your friend s．
A．Focu s on the future．
B．Thi s can be e specially harmful to the aged．
C．It should be something like learning gardening．
D．So take a few minute s each day to do some reading．
E．But don't worry if our schedule i sn't filled with life－changing event s．
F．Luckily, re search show s there i s a lot you can do to avoid tho se moment s．
G．In other word s, when you take care of your body, you take care of your brain．
查看答案和解析>>
科目：高中英语 来源： 题型：阅读理解
Seven Health Facts about Coffee
Whe.n you’re consideringyour.morning coffee, here are some healthfacts to keep in mind:
1, Coffee Reduces Your Risk of Diabetes（糖尿病）
In a 2005 review of nine studies, researchers found that for those that drank four to six cups of coffee per day, versus only. Two or fewer, their risk for Type 2 diabetes decreased by almost 30 percent. The number decreased:d by 35 percent when people drank more than six cups per da3day.And if you’re picturing yourself f running around the’office with your eyes bugging out of your head, no worries because caffeinated and decaffeinated coffees provided much the same results.
2. Coffee Fights Free Radicals（自由基）
We often forget that coffee is actually a plant and like all plant foods, the coffee bean contains more than 1,000 naturally occurring substances called phytochemicals, which may help prevent disease. Many of these phytochemicals are antioxidants which protect the cells from damage from free radicals.
3. Coffee Improves Memory and Cognition
Researchers reported that volunteers who drank caffeinated coffee in the morning performed better than nondrinkers on tests that involved learning new information. Coffee can also improve cognitive function as we age. One study found that combining coffee with a sweet treat had an even bigger impact.
4. Coffee Can Increase Osteoporosis（骨质疏松）
It s true that coffee can cause the body to excrete calcium in urine. We don’t want the.body to rid itself of calcium because this can lead to osteoporosis. According to The Diet Channel,about five milligrams of calcium is lost per every six ounces of coffee consumed. But these calcium losses can be counter balanced with two tablespoons of milk or yogurt per cup of coffee.
5. Coffee Causes Wrinkles
Even tho,ugh coffee has antioxidants, if you drink too much of it, it can cause wrinkling of the skin. This is a result of dehydration(脱水) which is the worst thing for your skin. So when you’re drinking that morning cup or two, make sure that you’re pairing it with water. Even better,add one tablespoon of chia seeds to your water and let them sit for 30 minutes. The chia seeds keep you even more hydrated than regular water.
6, Coffee Can Actually Cause Weight Gain
The blood sugar changes that a caffeine high produces can contribute enormously to a strong desire for it,’according to iVillage. Coffee is also socially connected to food. For example,we pair coffee with dessert or that morning powdered doughnut. Additionally, when we crash fiom our caffeine high that’s when we reach for all sorts of fatty snacks’ to keep us going.
7. Conventional Coffee Is Laden with Pesticides（杀虫剂）
The coffee plant is one of the most heavily sprayed crops. Lt’s coated with chemicals,pesticides, and herbicides, nothing you’d want to be swallowing. If you do drink coffee, make sure that it’s the organic variety, free from assorted chemicals that.leech into our ground water and can make us sick down the road.
If you switch to decaffeinated coffee, make sure the caffeine（咖啡因） is removed in a natural way without the use of chemicals to do it. Often times, conventional decaffeinated coffee has more chemicals than regular.
41. If you want to decrease the risk of diabetes by 35070, you need to take at least cups of coffee every day.
A. seven B. six C. five D. four
42.lf you are a heavy drinker of coffee, a far better way to avoid wrinkling of your skin is to drink water .
A.less than usual B. regularly C. with sugar D. with chia seeds
43. Which of the following statements is wrong?
A. Adding two spoons of milk to a cup of coffee can prevent calcium losses.
B. Decaffeinated coffee has different effects from caffeinated coffee as to diabetes.
C. Many phytochemicals protect the cells from damage from fiee radicals.
D. The organic variety of coffee p/ant is free from assorted chemicals.
44. The author has a/an attitude towards drinking of coffee.
A. positive B, negative C. objective D. imaginative
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
