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、From meat. B、From milk. C、From eggs. D、From sunshine. D短文一开始就提到了the easiest way to getvitamin D,即“从阳光中获取维生素D”。故选D。
A、From meat. B、From milk. C、From eggs. D、From sunshine. D短文一开始就提到了the easiest way to getvitamin D,即“从阳光中获取维生素D”。故选D。
admin
2016-04-01
25
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, and six hundred for those seventy-one and older. But some groups say these amounts are not high enough.
16. According to the speaker, what is the easiest way to get Vitamin D?
17. According to the speaker, who produces the most Vitamin D?
18. What do some experts worry about?
19. How much Vitamin D does an 80-year-old person need every day?
选项
A、From meat.
B、From milk.
C、From eggs.
D、From sunshine.
答案
D
解析
短文一开始就提到了the easiest way to getvitamin D,即“从阳光中获取维生素D”。故选D。
转载请注明原文地址:https://kaotiyun.com/show/e3L7777K
0
大学英语六级
相关试题推荐
FemaleRelationshipsA)Severalnewbooksandfilmsexplorethecomplexrelationshipsbetweenwomen.LucyScholesexplainswhyan
Ifyouintendusinghumourinyourtalktomakepeoplesmile,youmustknowhowto【C1】______sharedexperiencesandproblems.You
"Theworld’senvironmentissurprisinglyhealthy.Discuss."Ifthatwereanexaminationtopic,moststudentswouldtearitapart
StartupNuclearEnergyCompaniesAugurSafer,CheaperAtomicPowerA)Nothingcaptureshowfashionablethestartuphasbecomequi
Iamoneofthemanycitypeoplewhoarealwayssayingthatgiventhechoiceweshouldprefertoliveinthecountryawayfromt
InternetofThingsEraIsComingA)FrommeatthermometersmonitoredwithasmartphonetoWi-Fi-equippeddogcollars,devicesan
AustraliahasbeenunusualintheWesternworldinhavingavery【C1】______attitudetonaturaloralternativetherapies,accordin
AustraliahasbeenunusualintheWesternworldinhavingavery【C1】______attitudetonaturaloralternativetherapies,accordin
Iamoneofthemanycitypeoplewhoarealwayssayingthatgiventhechoiceweshouldprefertoliveinthecountryawayfromt
随机试题
简述学前儿童社会环境和社会规范认知活动的内容主要包括哪些方面。
乳腺癌的手术治疗中,全乳房切除术适用于________、________及年迈体弱不宜做根治术者。
采用单用户连续存储管理和_______存储管理的计算机系统一般采用静态重定位方式实现地址转换。
SupermarketMostsupermarketsneedaverylargefloorarea,sometimesatleasttentimesasbigasthatofanordinaryshop.
建设工程平行施工的特点包括( )。
某股份有限公司对外币业务采用业务发生当日的市场汇率进行折算,按月计算汇兑损益。7月1日和6日分别进口境外商品两批,价款分别为400万美元和280万美元,货款尚未支付,7月1日和7月6日的市场汇率分别为1美元=7.27元人民币和1美元=7.25元人民币。7月
“一两的遗传胜过一吨的教育”强调的是()。
下列各句中,没有语病的一句是()。
∫(1,1)(2,2)xy2dx+x2ydy=________
FourpeoplewerekilledandmorethanfiftyinjuredwhenfansrushedtogetintoastadiuminChicagoyesterdaywhereaBritish
最新回复
(
0
)