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
A、Taking excessive Vitamin D is harmful to health. B、Many people don’t know the importance of Vitamin D. C、Older people are more
A、Taking excessive Vitamin D is harmful to health. B、Many people don’t know the importance of Vitamin D. C、Older people are more
admin
2018-10-16
76
问题
Vitamin D helps bones and muscles grow strong and healthy.
The easiest way to get vitamin D is from sunlight. The ultraviolet rays react with skin cells to produce the vitamin. But many people worry about skin cancer and skin damage from the sun.
Also, darker skinned people produce less vitamin D than lighter skinned people. Production also decreases in older people and those living in northern areas that get less sunlight.
Not many foods naturally contain vitamin D. Foods with high levels include oily fish such as salmon, tuna and mackerel, and fish liver oils. Boston University researchers reported last year that farmed salmon had a lot less vitamin D than wild salmon.
Small amounts of D are found in beef liver, cheese and egg. And some people take dietary supplements containing the vitamin. But most of the D in the American diet comes from foods like milk with the vitamin added.
These days, more doctors are testing for vitamin D levels in their patients. But as research continues, some experts worry that if people take too much D, it might act as a poison. Also, skin doctors warn people to be careful with sun exposure.
How much vitamin D does a healthy person need? Nutrition experts who advise the American government set the current recommendations in 1997. The daily amount is two hundred international units from birth through age 50. Then it rises to four hundred international units through age seventy,[12]and six hundred for those seventy-one and older. But some groups say these amounts are not high enough.
9 According to the speaker, what is the easiest way to get Vitamin D?
10 According to the speaker, who produces the most Vitamin D?
11 What do some experts worry about?
12 How much Vitamin D does an 80-year-old person need every day?
选项
A、Taking excessive Vitamin D is harmful to health.
B、Many people don’t know the importance of Vitamin D.
C、Older people are more likely to lack Vitamin D.
D、More and more people suffer from skin caner.
答案
A
解析
短文提到专家们担心:“摄入过多的维生素D有可能还会有害”。A是原文同义再现,正确。
转载请注明原文地址:https://kaotiyun.com/show/QfH7777K
0
大学英语六级
相关试题推荐
Whilethemissionofpublicschoolshasexpandedbeyondeducationtoincludesocialsupportandextra-curricularactivities,the
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.Butjustwhatisitaboutthesocialnetworkthattakes
A、Workers.B、Cleaners.C、Students.D、Waiters.C推断题。从Igottoearnmoneyforschool和Metoo,tuitionsureishigh.可以推断,两人兼职都是为了挣学费,
A、ThedirectorisofAfricanancestry.B、ThedirectorwantedthesongsintheBroadwayversiontobeidenticaltothesongsint
A、Gary’ssister.B、ThewomantalkingwithGary.C、Theprofessorofthecourse.D、ThepainterDesiree.D细节题。对话中男士问Anddidyousay
Dopeoplegethappierormorefoul-temperedastheyage?Stereotypesofirritableneighbors【C1】______.scientistshavebeentryin
A、Theirliteraryvalue.B、Thedebateoverwhowrotethem.C、Thetimeperiodinwhichtheywerewritten.D、Whytheyarestillpop
A、Becausetheywanttoincreasetheirworkingexperience.B、Becausetheydonotyetknowwhatkindofpermanentjobtheywant.C
A、It’sfarfromtheacademicbuildings.B、Nobusesgotoit.C、Therearefewfirst-yearstudentslivingthere.D、It’solderthan
IsPaidFamilyLeaveBadforBusiness?A)Paidfamilyleave,whichtopstheagendaofMonday’sWhiteHouseSummitonWorking
随机试题
王大妈在市场承包了一个摊位卖水果,一天收摊后清点钱数时,王大妈发现手上有100元、50元和10元的钞票共48张,合计1760元,其中50元比10元多两张。问100元有多少张?()
尺神经损伤的临床表现中,下列哪项是恰当的
下述哪些是早期妊娠的体征
重点工程的施工现场应当履行的消防安全责任包括()。
20×1年1月10日,政府拨付甲公司400万元财政拨款(同日到账),要求用于购买大型科研设备1台;并规定若有结余,留归企业自行支配。20X1年2月1日,A企业购入不需要安装的大型设备。实际成本为360万元,使用寿命为10年。20×8年2月1日,甲企业出售了
2017年5月5日,甲公司向乙公司签发了一张金额为50万元,到期日为2017年9月1日,经A银行承兑的商业汇票。2017年5月15日,乙公司持有甲公司签发的汇票不慎丢失,后被张某在厂区内捡到,张某伪造了乙公司的签章代表乙公司持该汇票到外地的B银行申请贴现
根据下面材料回答问题。2011年某省广电产业实际创收收入达192.98亿元,同比增长32.33%。该省电影票房收入10.6亿元,同比增长45.24%,有线电视用户达。1970.12万户,比上年末净增84.24万户,其中有线数字电视用户达1177.
马斯洛认为,()被称为缺失需要,是我们生存所必需的,对生理和心理的健康具有重要的意义,必须得到一定程度满足。
下列说法中,符合布鲁纳认知—结构学习观的有()
CAT
最新回复
(
0
)