Vitamin D isactually a hormone rather than a vitamin; it is required to absorb calcium from the gut into the bloodstream. Vitamin D is mostly produced in the skin in response to sunlight and is also absorbed from food eaten (about 10% of vitamin D is absorbed this way) as part of a ...
Vitamin A supports the daily replacement of skin cells and ensures that tissues such as the conjunctiva are able to produce mucous and provide a barrier to infection. Vitamin A is also essential for vision under conditions of poor lighting, for maintaining a healthy immune system, for growth ...
The human body needs vitamins to stay healthy.Which vitamin is important for vision? A. Vitamin A. B. Vitamin B. C. Vitamin C. D. Vitamin D. 相关知识点: 试题来源: 解析 A。本题考查维生素的作用。维生素 A 对视力很重要;维生素 B 有多种作用但与视力关系不大;维生素 C 主要增强免疫力等;...
百度试题 结果1 题目Which vitamin is essential for maintaining healthy bones and teeth? A. Vitamin A B. Vitamin B C. Vitamin C D. Vitamin D 相关知识点: 试题来源: 解析 D. Vitamin D 反馈 收藏
The element needed to prevent beri-beri was shortly afterwards separated from rice coverings and is now known as vitamin B. The milled rice though more expensive was in fact causing the disease the hospital was trying to cure. Nowadays this terrible disease is much less common thanks to our ...
(成分)in the coverings may be the cause of the disease.Indeed this was the case.The element needed to prevent beri-beri was shortly afterwards separated from rice coverings and is now known as vitamin B.The milled rice though more expensive was in fact causing the disease the hospital was ...
A. was named the Eijkman vitamin B. did not affect the chickens C. did not result in beri-beri D. was vitamin B 67. What can be the best title of the passage? A. A Good Mixed Diet B. A New Discovery on Vitamin C. The Dangers of Beri-beri D. The Importance of Balaneed Vitam...
C;A;B;B;B;C 注意改写:如:4.One good way to get vitamin D is to及其选项B. play in the sunshine之和等于原文的整体改写与概括,尤其是Vitamin D is called the sunshine vitamin. It forms when the skin is bared to the sun.和Long before people knew what vitamin D was, they learned that ...
keep healthy." 1.Why Vitamin D is called "sunshine vitamin"? [ ] A.Because it is like sunshine B.Because people can get vitamin D in the sun. C.Because it is very important D.Because there isn't enough vitamin D in the food. ...
aVitamin D has multiple health benefits. It is similar to the other vitamins in the sense that it supports healthy growth and development but it also can retain calcium insuring positive bone and skeletal growth. The nervous system and muscle control are also strengthened by the use of this vi...