首页
登录
职称英语
Sunlight is a great source of vitamin D in most of the world. Yet a (an)【C1】
Sunlight is a great source of vitamin D in most of the world. Yet a (an)【C1】
游客
2024-02-20
6
管理
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 age 50 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. [br] 【C15】
选项
A、acknowledged
B、accomplished
C、adapted
D、accustomed
答案
A
解析
动词辨义题。本句意为“人们普遍接受的一个观点足,大多数人都需要补充一定量的维生素D”,acknowledge“承认”符合题意。accomplish“完成”;adapt“使适应,改编”;accustom“使习惯于”,均不符合文意,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3466091.html
相关试题推荐
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
随机试题
SittinginabackroomatLondon’sBarbicanartscenter,whichishostingth
Low-agedOverseasStudentsLow-agedoverseasstudyh
辅音不等于声母,元音不等于韵母。()
当办公用房、宿舍成组布置时,组内临时用房之间的防火间距不应小于3.5m;当建筑构
A.1—1断面和2—2断面 B.2—2断面和3—3断面 C.1—1断面和3—
(2011年)下列企业财务管理目标中,既没有考虑资金的时间价值,又容易造成企业经
谷类主要提供的维生素为( )。A.维生素D B.维生素A C.维生素E
《民法总则》与《民法通则》的规定不一致的,优先适用《民法总则》的规定。()?
A.花剥苔 B.类剥苔 C.燥苔 D.糙苔 E.地图舌舌苔不规则脱落,边
某建设工程正在进行楼板钢筋绑扎施工。施工总承包单位的技术负责人现场检查后,确认施
最新回复
(
0
)