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] 【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:https://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
______wasthoughttobeimpossibleinthepasthasnowbecomeareality.A、WhatB
Husband:Oh,dear,myeyesarereallysore.Wife:______Husband:Yes,andI’ve
下列关于巴比妥类镇静催眠药的理化通性的说法错误的一项是A.巴比妥酸本身无活性,C
古希腊戏剧起源于( )。A.盛大活动 B.山羊之歌 C.酒神祭祀 D.狂
王某是商务旅行社的导游,4月15日带团去云南,因临时有事,王某电告游客出发日期改
一般情况下,5岁以下的小儿,通常用成人量的A.二分之一 B.四分之一 C
根据《质量管理体系要求》,下列措施中,不属于质量预防措施的是()。A.确定不合
关于爱岗敬业,理解正确的是()。A、爱岗敬业是员工实现职业理想必不可少的
按照上海证券交易所上市公司行业分类标准,如果公司没有一类业务的收人和利润比重占
关于国家发展改革委委托咨询评估的说法,正确的有()。(新教材已删除)A.报
最新回复
(
0
)