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’
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’
admin
2012-07-05
59
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.
【C19】
选项
A、forward
B、through
C、on
D、over
答案
C
解析
固定搭配辨义题。此处意为“但是随着研究的继续,一些专家担心如果人们摄取太多的维生素D,就变成了毒药”,carry on“继续,进行”符合题意。carry forward“发扬,推进”;carry through“贯彻,完成”;carry over“继续存在”,均不符合文意,故排除。
转载请注明原文地址:https://kaotiyun.com/show/yL57777K
0
大学英语四级
相关试题推荐
7Therehasbeen______(稳步提高)inpeople’slivingstandardinrecentyears.
Wecommonlythinkofsportsmanshipinconnectionwithathleticcontests,butitalsoappliestoindividualoutdoorsports.Note
Wecommonlythinkofsportsmanshipinconnectionwithathleticcontests,butitalsoappliestoindividualoutdoorsports.Note
Wecommonlythinkofsportsmanshipinconnectionwithathleticcontests,butitalsoappliestoindividualoutdoorsports.Note
Drunkendriving,sometimescalledAmerica’ssociallyacceptedformofmurder,hasbecomeanationalepidemic(流行病).Everyhourof
A、Hethinkshehasbeenovercharged.B、Hedoesn’tlikehisneighbor.C、Heisunhappywiththepresentapartments.D、Heisforced
A、Bysharingtheprofitmadebythecompany.B、Bysellingthestockatahigherprice.C、Byworkinghard.D、Bystudyingaboutth
A、Workingataschool.B、Stayingathome.C、Studyingatadistantcollege.D、Leavingschoolforhome.C
Inpolicework,youcanneverpredictthenextcrimeorproblem.Noworkingdayisidenticaltoanyother,sothereisno"【B1】__
随机试题
调节中间点温度的方法有哪些?
A.原发性肝癌B.肝包虫病C.阿米巴性肝脓肿D.细菌性肝脓肿E.肝血管瘤禁忌做诊断性穿刺者
配对比较的秩和检验,若检验假设H0成立,则
企业在确定资产可收回金额时,应预计资产的未来现金流量。预计的资产未来现金流量应当包括的内容有()。
关于对上市客户法人治理结构的分析,下列说法中正确的是()。
如图1,把正方形CGEF的对角线CE放在正方形ABCD的边BC的延长线上(CG>BC),取线段AE的中点M。探究:线段MD、MF的关系,并加以证明。
我国宪法规定:“任何公民都享有宪法和法律规定的权利,同时必须履行宪法和法律规定的义务。”我国公民的最高法律义务是
安装Linux时必须创建的分区是(59),在Linux中规定,每一个硬盘设备最多能有(60)个主分区,硬盘hda5是(61)。
每年年终,太平洋公司都会给在职员工发放年终奖金,公司会计小任负责计算工资奖金的个人所得税并为每位员工制作工资条。按照下列要求完成工资奖金的计算以及工资条的制作:参照工作表“员工基础档案”中的信息,在工作表“年终奖金”中输入与工号对应的员工姓名、部门
RudolphValentinoboughtabeautifulring.Thejewelersaidthatithada【D6】________onit,butValentinodidnot【D7】________cu
最新回复
(
0
)