首页
登录
职称英语
[originaltext] Vitamin D helps bones and muscles grow strong and healthy.
[originaltext] Vitamin D helps bones and muscles grow strong and healthy.
游客
2024-04-23
72
管理
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://tihaiku.com/zcyy/3568087.html
相关试题推荐
[originaltext]Thankyouallforcomingtomytalkthisevening.It’snice
[originaltext]Thankyouallforcomingtomytalkthisevening.It’snice
[originaltext]Thankyouallforcomingtomytalkthisevening.It’snice
[originaltext]Xwasasecretagent.Hehadrentedafurnishedroominapro
[originaltext]WaltWhitmanisoftencalledthepoetofAmericandemocracy.
[originaltext]M:Feellikegoingoutforawalk?W:Notrightnow—I’mataver
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoI’vejust
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoI’vejust
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoI’vejust
[originaltext]M:Couldyoutellmethetimetablefortheschoolbus?W:Well,t
随机试题
1WhenAmericahadanenergycrisis,ourleadersrespondedbycreatingth
[originaltext]TomHanks,JuliaRoberts,ERandFriendsweresomeofthebig
ClosenessandPersonalSpace1.IntimatedistanceRange:【T1】______to45cmIn
【B1】[br]【B16】A、AndB、StillC、YetD、EvenC参照本句中“这些(线索)都不会令人百分之百地满意”。可以看出上一句说有一些
年夜饭吃年夜饭是春节期间家家户户最热闹的时刻。除夕夜
[originaltext]Healthfoodisageneraltermappliedtoallkindsoffoodth
试讲题目 1.题目:考试焦虑 2.内容 肌肉放松训练:做的时候注意肌
招聘团队应由()组成。A.企业高层管理人员 B.人力资源管理人员 C.用人
某事业单位拟采购一种特定的技术服务,经向社会公开招标没有合格标的,在此情形下,该
以下对关税的描述,不正确的是() A.属于直接税B.对进出口货物都设优
最新回复
(
0
)