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
Sunlight is a great source of vitamin D in most of the world. Yet a(an)【C1】______number of experts think that many people aren’t
Sunlight is a great source of vitamin D in most of the world. Yet a(an)【C1】______number of experts think that many people aren’t
admin
2012-08-10
46
问题
Sunlight is a great source of vitamin D in most of the world. Yet a(an)【C1】______number of experts think that many people aren’t getting enough vitamin D—【C2】______those who work and play indoors.
It’s long been known that vitamin D is【C3】______for strong bones. Research in the last several years has shown that low levels of vitamin D may increase the risk of heart【C4】______in men and deaths from some cancers. But new research suggests that it also protects against a wide【C5】______of diseases. Low levels of vitamin D have also been【C6】______with various forms of cancer and high blood pressure, stroke,【C7】______illness etc. The strongest source,【C8】______far, is ultraviolet (紫外线) B rays from the sun, which【C9】______a form of cholesterol (胆固醇) into vitamin D in the skin. But UVB rays【C10】______greatly depending on cloud cover, time of year and time of day. Dark-skinned and elderly people don’t【C11】______vitamin D from the sun as【C12】______as younger, fair-skinned people. UVB rays also don’t【C13】______glass or sunscreen with a factor of 8 or more. It’s difficult to get much vitamin D through diet. Few foods【C14】______it naturally. It’s widely【C15】______that most people need some supplemental vitamin D—the question is, how much? Current U. S. guidelines, issued in 1997,【C16】______for 200 international units from birth through age 50. The National Osteoporosis Foundation【C17】______adults over age50 to get at least 800 to 1, 000 IUs to【C18】______against fractures (骨折).
But as some experts research carry【C19】______the experiment, they worry that if people take too much vitamin D, it might act as a poison. Also, skin doctors warn people to be careful with sun【C20】______because of the risk of skin cancer.
【C7】
选项
A、psychological
B、spiritual
C、inner
D、mental
答案
D
解析
形容词辨义题。前面提到维生素D不足与多种体质性疾病有关,此处指精神疾病,与之并列,故mental“精神的,脑力的”符合题意。psychological“心理的,心理学的”;spiritual“精神的,心灵的”;inner“内部的,内心的”,均不符合文意,故排除。
转载请注明原文地址:https://kaotiyun.com/show/6C57777K
0
大学英语四级
相关试题推荐
A、Itworksonwetsurfaces.B、It’sstrongerthansyntheticglue.C、It’sanutritioussourceofprotein.D、Ithasbeenusedsucce
A、Beforebreakfast.B、Inthelatemorning.C、Inthelateafternoon.D、Inthelateevening.C
Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.Thisis,however,a【S1】______Noschoo
Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.Thisis,however,a【S1】______Noschoo
ThecauseofthedeclineofNorthAfricaispopularlyattributedtoclimaticchanges,thetheorybeingthattheareabecamehott
Childrenlearnalmostnothingfromtelevision,andthemoretheywatchthelesstheyremember.Theyregardtelevisionpurely【C1】
SigmundFreud,theworld-famousdoctorofVienna,wasathinkerwhochangedthewaywelookatmentaltrouble.Healsohada【S1】
Astudyofarthistorymightbeagoodwaytolearnmoreaboutaculturethanispossibletolearningeneralhistoryclasses.M
A、TheTowerofLondon.B、TheTowerBridgeinLondon.C、TheThames.D、Thetallandoldwarehouses.B主旨题。本文介绍伦敦塔桥的故事。通过浏览选项可知,本题考的
It______(我突然想到)Ihaveameetingtoattendthisafternoon.
随机试题
Longagotherewasabusymarketplaceinatown.Peoplecametobuyand【C1】______allsortsofthingsthere.Onedayanold
按《城市道路交通规划设计规范》,机动车公共停车场用地面积,宜按当量小汽车停车位数计算,机动车地面停车场每个车位用地面积和地下停车库每个车位建筑面积分别宜为()。
下列选项属于项目间接建设成本的有()。
设备合同管理的重要性体现在()。
以下内容属于物流企业信息化工具的是()。
41个学生要坐船过河,渡口处只有一只能载4人的小船(无船工),他们要全部渡过河去,至少要使用这只小船渡河多少次?()
因工作需要,某单位决定从本单位的3位女性(小王、小李、小孙)和5位男性(小张、小金、小吴、小余、小孟)中选出4人组建谈判小组参与一次重要谈判。选择条件如下:(1)小组成员既要有女性,也要有男性;(2)小张与小王不能都入选;(3)小李与小孙不能都入选;
路径测试是整个软件测试的柱石,它是对软件的【】进行测试的一种方法。
TheyWillarrivehere__________twoWeeks.
Youcan______yourpricessoastocoveruswithacertainpercentage.
最新回复
(
0
)