首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
admin
2011-01-06
109
问题
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Researchers are finding that what you eat may interfere with cancer growth at various stages. For example, certain foods can block the chemicals that initate cancer. Antioxidants(抗氧化剂), found in some vitamins and minerals, can snuff out oxygen free radicls (氧自由基), substances that are thought to make cells more susceptible to cancer, and they can even repair some of the cellular damage that has been done. And some food—wheat bran(麦,糠) in particular—has been shown to shrink precancerous(癌症前期的) cells.
A recent review of 17 studies from 17 nations reveals that people who eat the most fruits and vegetables have about half the cancer raters of those who eat the least. In fact, some research suggests that frequent consumption of fruits and vegetables can cut the risk of lung cancer even in smokers.
One of the most studied antioxidants in vegetables and fruits thought to protect against cancer is beta-carotene(β胡萝卜素), concentrated in deep green, yellow and orange vegetables such as carrots, sweet potatoes and spinach.
Research also shows that beta-carotene can change in the body to retinoic acid (维生素A酸), a substance used in clinical trials to treat certain cancers.
Here are some of the foods that contain cancer-fighting chemicals.
Tomatoes. One of the compounds in tomatoes that is thought to reduce the risk of cancer is lycopene(蕃茄素), the pigment (色素) that makes tomatoes red. Lycopene, an antioxidant that is also found in watermelons and apricots, quenches certain cancer-triggering oxygen free fadicals. Healthy people with the most blood lycopene.
Green Vegetables. A recent Italian study showed that dark-green leafy vegetables lower the risk of many cancer. Spinach, broccoli, kale and dark-green lettuces are chock-full of antioxidants, including beta-carotene, folate(叶酸) and lutein(叶黄素).A good rule of thumb(单凭经验的做法) : the darker the vegetable, the more antioxidants within.
Pungent preventives(刺激性的预防物). A whole host of chemicals thought to have cancer-inhibiting properties have been identified in allium vegetables, which include garlic, onions and scallions(大葱). Animal studies show that many of these chemicals block carcinogens that have been linked to colon, stomach, lung and liver cancer. A study at Pennsylvania State University found that feeding rats various garlic extracts and preparations(配制好的食物) reduced mammary tumors by as much as 71 percent. In humans, studies suggest that those who eat more onions and garlic are less prone to gastrointestinal cancer.
Research suggests that garlic compounds may even interfere with cancer progression. A recent German study found that ajoene, a garlic compound, is toxic to malignant cells. Garlic may also antagonize existing cancer by boosting(促进) immune functions, according to researchers at Loma Linda University School of Medicine. Their study, done on mice, found that garlic’s sulfur compounds increased the activity of macrophages and T-lymphocytes(淋巴细胞), two of the components of the immune system that destroy tumor ceils.
Citrus fruit may be particularly effective in reducing the risk of pancreatic cancer.
选项
A、Right
B、Wrong
C、Not mentioned
答案
C
解析
该句句意为“柑橘可能在降低胰腺癌危险性方面特别有效。”但文中并未提到这点。
转载请注明原文地址:https://kaotiyun.com/show/2zmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Recently,amanwhowasalwaysingoodhealth,spentaweekinbedwithsevereflu.Itwastheworstillnessinhislife.Thepr
Inthelate1960’s,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskysc
1.Theterm"jointinternationalbusinessventure",jointventureforshort,hascometomeanmanythingstomanypeople.Itsom
1.Theterm"jointinternationalbusinessventure",jointventureforshort,hascometomeanmanythingstomanypeople.Itsom
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplegotogetaneducation.Nevertheless,ithasbeensaid
1.Ancientpeoplemadeclaypotterybecausetheyneededitfortheirsurvival.Theyusedthepotstheymadeforcooking,storing
Playistheprincipalbusinessofchildhood,andinrecentyearsresearchhasshownthegreatimportanceofplayinthedevelopm
HowtheBodyKeepstheSameTemperatureThetemperatureofyourbodyshouldbealwaysjustthesame,nomatterwhetherthewe
Inthepast,doctorscouldn’tdoanythingaboutstomachulcers.Stomachulcerscanleadtostomachcancer.
A.stayuptilltheearlyhoursofthemorningB.sleepenoughtobringmostrefreshmentC.rebuildmemoriesstoredduringthed
随机试题
在GBK编码标准中,汉字机内码和西文字符ASCII码的区别是()。
为防止肾上腺素氧化变质和消旋化,肾上腺素注射液可用何种气体饱和的注射用水配制
患者发黄干枯,稀疏易落的临床意义是
A、kB、αC、βD、γE、Km消除速度常数表示为
框架—剪力墙结构在8度抗震设计中,剪力墙的间距不宜超过下列哪一组中的较小值?(B为楼面宽度)
对于一般工业与民用建筑工程的分部工程而言,下列不属于分部工程的是()。
甲公司在制定未来五年发展规划时,决定立足于现有的食品和饮料业务,同时开拓宠物食品业务,并根据企业的资源状况,决定了各项业务在战略谋划期间的资源分配和发展方向。根据以上信息,请判断该公司制定的是()。
在幼儿活动中,幼儿教师为幼儿提供的活动材料()。
某工程计划如图3-5所示,各个作业所需的天数如表3-3所列,设该工程从第0天开工,则作业I最迟应在第(35)天开工。
______是指能对计算机中所存放的大量数据进行管理和控制的一种系统软件。
最新回复
(
0
)