首页
登录
职称英语
The vitamins necessary for a healthy body are normally supplied by a good mi
The vitamins necessary for a healthy body are normally supplied by a good mi
游客
2024-01-19
38
管理
问题
The vitamins necessary for a healthy body are normally supplied by a good mixed diet(饮食), including a variety of fruits and green vegetables. It is only when people try to live on a very restricted diet that it is necessary to make special provision to supply the missing vitamins.
An example of the dangers of a restricted diet may be seen in the disease known as " beriberi". It used to distress large numbers of Eastern peoples who lived mainly on rice. In the early years of this century, a scientist named Eijkman was trying to discover the cause of "beri-beri". At first he thought it was caused by a germ. He was working in a Japanese hospital, where the patients were fed on polished rice which had the outer husk(外壳)removed from the grain. It was thought this would be easier for weak and sick people to digest.
Eijkman thought his germ theory was confirmed when he noticed the chickens in the hospital yard, which were fed on leftovers(剩饭)from the patients’ plates, were also showing signs of the disease. He then tried to isolate the germ, but his experiments were interrupted by a hospital official , who declared that the polished rice, even though left over by the patients, was too good for chickens. It should be recooked for the patients, and the chickens should be fed on cheap rice with the outer layer still on the grain.
Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unpolished rice somehow prevented or cured "beri-beri" —even that a lack of some element in the husk might be the cause of the disease. Indeed this was the case. The element needed to prevent "beri-beri" was shortly afterwards isolated from rice husks and is now known as vitamin B. Nowadays, this terrible disease is much less common thanks to our knowledge of vitamins. [br] The chemical substance missing from polished rice______.
选项
A、was vitamin B
B、did not affect the chickens
C、was named the Eijkman vitamin
D、has never been accurately identified
答案
A
解析
细节推断题。根据定位段可以知道,精米中所缺少的物质是维生素B。
转载请注明原文地址:https://tihaiku.com/zcyy/3376909.html
相关试题推荐
[originaltext](1)Risinglevelsofobesityandunhealthyweightscouldbeli
[originaltext]Peoplehavelongknownthatnutsarepartofahealthydiet.
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinked
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinked
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinke
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinked
[originaltext]Risinglevelsofobesityandunhealthyweightscouldbelinked
[originaltext]Toomucheating.Toomuchunhealthyfood.Toomanyadvertiseme
[originaltext]Toomucheating.Toomuchunhealthyfood.Toomanyadvertiseme
[originaltext]Sayyougetintobed,preparedforahealthysevenoreightho
随机试题
[originaltext]W:Hi,Larry,areyouwaitingtoseeProfessorJameson,too?M:Y
Citiesaregettingsmarter,embeddedwithmoreInternet-connecteddevicesth
中国共产党领导下的第一次新闻改革是在()年。A.1942 B.1948 C.
对某一流段,设其上、下游两断面1-1、2-2的断面面积分别为A1、A2,断面流速
聚氯乙烯双壁波纹管扁平试验垂直方向外径形变量25%时,立即卸荷试样应无破裂。
呼吸性酸中毒的代偿反应为:()A. B. C. D. E.
题目的左边4个图形呈现一定的规律。根据这种规律,你需要在右边所给出的备选答案中选
农民利用宅基地建造的住房登记,应缴纳房屋登记费()元。A.0 B.10
共用题干 第二篇LoveorHate?Wehavesavedasa
某开发商拟拆除某教学楼附属工程,已经办理拆迁许可证,按照法律规定,还应当将(
最新回复
(
0
)