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
2023-08-13
38
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、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://tihaiku.com/zcyy/2921464.html
相关试题推荐
"Theworld’senvironmentissurprisinglyhealthy.Discuss."Ifthatwerean
[originaltext]TodayI’dliketotalkaboutthesculptorHenryMoore,inpa
[originaltext]TodayI’dliketotalkaboutthesculptorHenryMoore,inpa
[originaltext]TodayI’dliketotalkaboutthesculptorHenryMoore,inpa
[originaltext]Let’sbegintodaybydiscussingenzymes.Enzymesarewhatma
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
[originaltext]Inthe18thcenturyFrencheconomistsprotestedtheexcessive
[originaltext]TheEducationSelectCommitteehasbeenexaminingtheunderac
[originaltext]TheEducationSelectCommitteehasbeenexaminingtheunderac
[originaltext]TheEducationSelectCommitteehasbeenexaminingtheunderac
随机试题
SexisminEnglishSexisminEnglishlanguagereflectsthetraditionalethicsth
(1)Josephwasanelderly,nay,anoldman:veryold,perhaps,thoughhalean
HowwouldsomeEasternAsiansstarttheirconversationwhentheymeetforthefi
C九宫格对角线上的月亮缺口向左,其余月亮缺口向右,黑、白星星的个数均等。
下边四个小图形中,只有一个是由上边的四个图形拼合而成(只能通过上,下,左,右平移
接收“110”报警是一项公安专业工作。( )
纳税人支付下列款项取得的增值税普通发票或增值税电子普通发票,发票税率栏填写为“不
(2016年真题)在其他条件一定的情况下,有助于强化人们当前的高等教育投资动机的
下列有关回函中免责条款或限制条款的说法中,错误的是()。A.格式化的免责条
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)