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
2024-04-11
17
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/3549912.html
相关试题推荐
TheevidencehasgottenmuchstrongerthatasubstanceknownasC-reactivep
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Youprobablyknowwhatamobileis,butthemobileI’mtalkin
[originaltext]Youprobablyknowwhatamobileis,butthemobileI’mtalkin
[originaltext]Youprobablyknowwhatamobileis,butthemobileI’mtalkin
[originaltext]W:Iwonderifyoucouldtellmealittlebitaboutyourjobasa
[originaltext]W:Iwonderifyoucouldtellmealittlebitaboutyourjobasa
随机试题
Morethan85percentofFrenchCanada’spopulationspeaksFrenchasamotherton
Theword"gifts"inlineImeans______.[br]Accordingtothepassage,whichis
[originaltext]M:Ifitdoesnotrain,let’sgooutforawalkthisevening.W:
健康管理消费行为的特征可以分为()等类型。A.习惯型 B.土豪型 C.理智型
()管理是银行经营的重要职能,是银行体系稳健运行的重要保障。A.流动性风险
假设证券市场只有证券A和证券B,证券A和证券和1.2,无风险借款利率为3%,那么
商业汇票的付款期限,最长不得超过()个月,提示付款期限自汇票到期日起(
小便不畅或点滴不通,咽干,烦渴欲饮,呼吸急促,或有咳嗽,舌红苔薄黄,脉数,宜选方
A.IgG1B.IgG2C.IgG3D.IgG4E.总IgG肾病综合征患者以哪类
(2017年真题)在初步可行性研究、机会研究和规划中,项目投资和成本费用可主要采
最新回复
(
0
)