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
46
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] 【C1】
选项
A、exciting
B、amusing
C、flourishing
D、growing
答案
D
解析
形容词辨义题。前一句提到“太阳光是维生素D的一种非常充裕的来源”,而此处用yet进行转折,意为“不过,有越来越多的专家认为……”,故growing“越来越多的”符合题意。exciting“令人兴奋的,使人激动的”;amusing“有趣的,好玩的”;flourishing“繁荣的,繁茂的,盛行的”,均不符合文意,故排除。
转载请注明原文地址:http://tihaiku.com/zcyy/3466077.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
Itisoftenobservedthattheagedspendmuchtimethinkingandtalkingabou
TowardstheendofThinking,FastandSlow,DanielKahnemanlamentsthathe
ClosenessandPersonalSpace1.IntimatedistanceRange:【T1】______to45cmIn
教育教学工作应当符合教育规律和学生身心发展的特点,面向全体学生,教书育人,将德育
试述教育文献检索的要求。
急性血源性骨髓炎经抗生素治疗一周后,全身及局部症状消失,下一步的治疗为 A.
2019年10月,李某从某汽车4s店(一般纳税人)购入一辆排气量为2
汽车客运站规模大小以涉及年度年()和旅客最高聚集人数为依据,结合所在地国民经济发
A公司与B公司均为增值税一般纳税人,A公司委托B公司加工一批材料(属于应税消费品
女,18岁。低热、腹痛、腹泻伴腹胀2个月。体查:腹壁揉面感,腹部移动性浊音阳性。
最新回复
(
0
)