首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Nowadays it is understood that a diet, which contains nothing harmful may yet result in serious disease if certain important de
Nowadays it is understood that a diet, which contains nothing harmful may yet result in serious disease if certain important de
admin
2010-05-26
87
问题
Nowadays it is understood that a diet, which contains nothing harmful may yet result in serious disease if certain important dements are missing. These elements are called "vitamins". Quite a number of such substances are known and they are given letters to identify them, A, B, C, D, and so on. Different diseases are associated with deficiencies of particular vitamins. The vitamins necessary for a healthy body are normally supplied by a good mixed diet, including a variety of fruit and green vegetables, h is only when people try to live on a very restricted diet, say during extended periods of religious fasting, or when trying to lose weight, that it is necessary to make special provision to supply the missing vitamins.
One example of the dangers of a restricted diet may be seen in the disease known as beriberi(脚气病), which used to afflict large numbers of Eastern peoples who lived mainly on rice. In the early years of this century, a Dutch scientist called Eijkman was trying to discover the cause of beriberi. At first he thought it was transmitted by a germ. He was working in a Japanese hospital, where the patients were fed on rice which had had the outer husk removed from the grain. It was thought this would be easier for weak, sick people to digest. Eijkman thought his germ theory was confirmed when he noticed, the chicken in the hospital yard, which were fed on scraps from the patients’ plates, were also showing signs of the disease. He then tried to isolate the germ fie thought was causing the disease, but his experiments were interrupted by a hospital official, who claimed that the huskless rice, even though left over by the patients, was too good for chickens. It should be recooked and the chickens fed on cheap, coarse rice with file outer covering still on the grain. Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unmilled rice somehow prevented or cured beriberi—even that a lack of some ingredient in the husk might be the cause of the disease.
Indeed this was the case. The element needed to prevent beriberi was shortly afterwards isolated from rice husk and is now known as vitamin B. The milled rice, though more expensive, was in fact perpetuating the disease the hospital was trying to cure. Nowadays, this terrible disease is much less common; thanks to our knowledge of vitamins.
The ingredient missing from milled rice______.
选项
A、was vitamin B
B、did not affected the chickens
C、was named the Eijkman vitamin
D、has never been accurately identified
答案
A
解析
细节题。本题问的是:碾过的大米中缺乏的成分是______。仔细分析文章中的例子可知,医院里的病人和鸡因为吃碾过的大米而得了脚气病——一种由于缺乏维生素B而引发的疾病;而改吃带壳的糙米后,疾病的症状就消失了。这说明碾过的大米中缺乏维生素 B,故选A 。
转载请注明原文地址:https://kaotiyun.com/show/IkV7777K
0
大学英语四级
相关试题推荐
GeorgeDanielslivesinLondon.Heisawatchmaker.Hisworkcontinuesthe【B1】______oftheEnglishwatchmakersofthe18thand
GeorgeDanielslivesinLondon.Heisawatchmaker.Hisworkcontinuesthe【B1】______oftheEnglishwatchmakersofthe18thand
TherehavebeensomeattemptsintheUnitedStates,Europe,Australiaoverthepastdecadesto【C1】______governmentstopaypeo
TheNorwegianGovernmentisdoingitsbesttokeeptheoilindustryundercontrol.Anewlawlimitsexplorationtoanareasouth
A、Aninterviewbyatalkshowhost.B、Ameetingbetweentwotradingcompanies.C、Aninterviewbetweenawomanandaman.D、Anin
Thestandardoflivingofanycountrymeanstheaverageperson’sshareofthegoodsandserviceswhichthecountryproduces.Ac
Whatishappiness?WeAmericansbelievethattherightto【C1】______happinessisissuedtouswiththebirth【C2】______,butn
IndealingwithstrangerstheruleforBritishsocietyisthatyoumustavoidstaringatthematthesametimeavoidignoringth
A、Shemadegoodtips.B、Shewasfinedbecauseshedrovedesperately.C、Shehitapoleandwasfiredagain.D、Herpassengerwasb
A、Wanted!EarthandSeas.Morecarefortheearth.B、Wanted!RiversandOceans.Morecareforthewater.C、Wanted!SeasandOcea
随机试题
在房间中利用火炉进行取暖时,其传热方式为()。
下列作品出自同一作家的是()
胃蛋白酶作用的最适pH是
患儿,8岁。因发热,关节肿痛而入院,经检查确定为风湿性关节炎,查体时未发现心脏异常,医生嘱其服用阿司匹林,其总疗程一般为
由十各行业生产性质和条件的不同,建筑系数和场地利用系数的大小必然有所差异,就一般工业项目而言,其建筑系数应不低于()。
下列境内纳税义务人书面申请海关无需进行价格质疑和磋商,依法审查确定进出口的是()。
法国后印象派的代表画家是()
1979年4月召开的中共中央工作会议决定对国民经济实行的方针是()。
在xOy坐标平面上,连续曲线L过点M(1,0),其上任意点P(x,y)(x≠0)处的切线斜率与直线OP的斜率之差等于ax(常数a>0).求L的方程;
Theevolutionofsexratioshasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesa
最新回复
(
0
)