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
2024-03-13
52
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,[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、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 get vitamin 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/3530675.html
相关试题推荐
[originaltext]Moderator:Facedwithawidevarietyofgoodsintheshopping
[originaltext]Hello,everybody.WhatIwanttotalkabouttodayisanidea
[originaltext]Hello,everybody.WhatIwanttotalkabouttodayisanidea
[originaltext]Goodafternoon,everyone.Ican’ttellyouhowhonoredIamt
[originaltext]Goodafternoon,everyone.Ican’ttellyouhowhonoredIamt
[originaltext]Goodevening.YouarelisteningtoPopWorldofBCDInternati
[originaltext]Goodevening.YouarelisteningtoPopWorldofBCDInternati
[originaltext]VitaminDhelpsbonesandmusclesgrowstrongandhealthy.
[originaltext]VitaminDhelpsbonesandmusclesgrowstrongandhealthy.
[originaltext]W:Hello.Isthistheregistrationoffice?M:Yes.ThisisHerber
随机试题
DidMarcoPoloTelltheTruth?Thereisacontroversyabo
Telecommunicationsstandfordevicesandsystemsthattransmitelectronicoropt
HowtoFightDepressionWithoutOutsideHelpDepressionisac
下列关于宪法特点的表述,不正确的是()。A.宪法由全国人民代表大会制定、通过和修
下面说法错误的是()A.TCP协议可以提供可靠的数据流传输服务 B.TCP协
可行性研究报告与项目申请书的区别有( )。A:适用范围和作用不同 B:深度要求
A.特异性抗体B.同种异型抗体C.交叉反应性抗体D.隐蔽抗原E.修饰的抗原交感性
下列不是对栓剂基质的要求的是A、在体温下保持一定的硬度 B、不影响主药的作用
某公司一名员工取得了《报检员证》,该公司其他人也可持其《报检员证》到检验检疫机构
下列有关内部控制的相关表述中,注册会计师认可的有()。A.预防性控制可能是人工的
最新回复
(
0
)