我们需要一个形容词来描述“sunlight”,并且这个形容词要与“直接的”意思相符。在中文中,“直接的”对应到英文中通常使用“direct”这个形容词。因此,正确的填空应该是“direct”。完整的句子为:Getting vitamin D from direct sunlight is far from enough.这句话的意思是:“从直接的阳光中获取维生素D是远远不够...
Light levels help to regulate alertness and mood. We also rely on sunlight to convert cholesterol in the skin intovitamin D, which helps build strong bones, and plays a beneficial role in our immune system. Some headlines even suggest that sunlight could and helpprotect us from the c...
People can get vitamin D from the following EXCEPT ___. A. Sunlight. B. Cod-liver oil. C. Medium exercise. D. Supplements of Vitamin 相关知识点: 试题来源: 解析 C 正确答案:C 解析:此题是事实题。由第一段可知,维生素D可通过晒太阳、饮食和补充剂来获取。 知识模块:阅读反馈 ...
Contributions of sunlight and diet to vitamin D status[J]. Calcif Tissue Int, 2013, 92(2): 163-176.Contributions of Sunlight and Diet to Vitamin D Status[J] . Helen M. Macdonald.Calcified Tissue International . 2013 (2)Macdonald HM. Contributions of sunlight and diet to vitamin D ...
SUNLIGHT DEGRADATION OF VITAMIN D3 A.R.WEBB, B.DECOSTA AND M.F.HOLICK. Boston University School of Medicine, Boston, MA 02118. Introduction Casual exposure to sunlight is responsible for providing the vitamin D requirement of much of the world's population. During exposure to sunlight, high...
Getting enough vitamin D为动词-ing形式短语作主语,谓语动词用第三人称单数形式,所以填is。【小题8】考查定语从句。分析句子结构可知,空处引导定语从句,先行词为a disease,且定语从句中缺少主语,所以填that/which。【小题9】考查非谓语动词。a 2008 study和publish之间是逻辑上的动宾关系,故用过去分词作后置定语,...
Through exposure to the sun’s ultraviolet B (UVB) radiation, the skin produces more than ninety percent of the body’s vitamin D3 needs. The primary objective of this study was to estimate and compare the mean concentration of vitamin D3 (IU) produced by daily exposure to UV light during...
___naturally by the skin when exposed to sunlight, Vitamin D is needed for healthy bones, teeth and muscles. A. Making B. To make C. Made D. Make 相关知识点: 试题来源: 解析 【答案】C【解析】考查非谓语动词。根据句子结构,划线处是分词作状语;维生素D是被皮肤生产,需要使用被动语态,因此使...
D. Pcople don't need much sunlight to produce vitamin D)65. What may be the best title for this passage? A. How Can We Fecl Happy? B. How Can We Get Vitamin D? C. What Influences Our Emotions? D. What Can Change the Weather? 相关知识点: 试题来源: 解析 答案见上 反馈 收...
to get enough sun exposure during certain parts of the year. It is important to understand that in the summertime, when you put on your bathing suit and sunbathe for 30 minutes, your body produces about 20,000 IUs of vitamin D -- as much as exists in 200 glasses of milk, or the ...